[EFR32] Add comments to examples BUILD.gn

[jepenven-silabs]

Problem

No enough comments in the build.gn files

Change overview

Added comments and logic cleanup

Testing

Build locally

[github-actions]

PR #16575: Size comparison from b24efd9 to 118ee94

Full report (27 builds for cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, p6, telink)

platform	target	config	section	b24efd9	118ee94	change	% change
cyw30739	light	cyw930739m2evb_01	(read/write)	603478	603478	0	0.0
			.app_xip_area	510576	510576	0	0.0
			.bss	75656	75656	0	0.0
			.data	596	596	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	lock	cyw930739m2evb_01	(read/write)	561274	561274	0	0.0
			.app_xip_area	469900	469900	0	0.0
			.bss	74160	74160	0	0.0
			.data	560	560	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	ota-requestor-no-progress-logging	cyw930739m2evb_01	(read/write)	573358	573358	0	0.0
			.app_xip_area	472336	472336	0	0.0
			.bss	83488	83488	0	0.0
			.data	500	500	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	922876	922876	0	0.0
			(read/write)	128748	128748	0	0.0
			.bss	126760	126760	0	0.0
			.data	1988	1988	0	0.0
			.text	922868	922868	0	0.0
		BRD4161A+rpc	(read only)	951708	951708	0	0.0
			(read/write)	144704	144704	0	0.0
			.bss	142536	142536	0	0.0
			.data	2168	2168	0	0.0
			.text	951700	951700	0	0.0
	window-app	BRD4161A	(read only)	852672	852672	0	0.0
			(read/write)	126720	126720	0	0.0
			.bss	124856	124856	0	0.0
			.data	1864	1864	0	0.0
			.text	852664	852664	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	964156	964156	0	0.0
			(read/write)	1393714	1393714	0	0.0
			.dram0.bss	62072	62072	0	0.0
			.dram0.data	14188	14188	0	0.0
			.flash.rodata	198536	198536	0	0.0
			.flash.text	964156	964156	0	0.0
			.iram0.text	62016	62016	0	0.0
		m5stack	(read only)	1020691	1020691	0	0.0
			(read/write)	461492	461492	0	0.0
			.dram0.bss	67600	67600	0	0.0
			.dram0.data	34016	34016	0	0.0
			.flash.rodata	228040	228040	0	0.0
			.flash.text	1015307	1015307	0	0.0
			.iram0.text	123107	123107	0	0.0
k32w	light	k32w061+release	(read/write)	701652	701652	0	0.0
			.bss	77648	77648	0	0.0
			.data	1868	1868	0	0.0
			.text	616336	616336	0	0.0
	lock	k32w061+release	(read/write)	701088	701088	0	0.0
			.bss	77624	77624	0	0.0
			.data	1908	1908	0	0.0
			.text	615756	615756	0	0.0
linux	all-clusters-app	debug	(read only)	2478313	2478313	0	0.0
			(read/write)	143216	143216	0	0.0
			.bss	57312	57312	0	0.0
			.data	1264	1264	0	0.0
			.data.rel.ro	78904	78904	0	0.0
			.dynamic	592	592	0	0.0
			.got	4168	4168	0	0.0
			.init	27	27	0	0.0
			.init_array	936	936	0	0.0
			.rodata	211941	211941	0	0.0
			.text	2102898	2102898	0	0.0
	bridge-app	debug+rpc	(read only)	1753357	1753357	0	0.0
			(read/write)	89424	89424	0	0.0
			.bss	44456	44456	0	0.0
			.data	1952	1952	0	0.0
			.data.rel.ro	37944	37944	0	0.0
			.dynamic	592	592	0	0.0
			.got	3920	3920	0	0.0
			.init	27	27	0	0.0
			.init_array	544	544	0	0.0
			.rodata	144556	144556	0	0.0
			.text	1493589	1493589	0	0.0
	chip-tool	debug	(read only)	10180709	10180709	0	0.0
			(read/write)	354976	354976	0	0.0
			.bss	22336	22336	0	0.0
			.data	1072	1072	0	0.0
			.data.rel.ro	325520	325520	0	0.0
			.dynamic	608	608	0	0.0
			.got	4784	4784	0	0.0
			.init	27	27	0	0.0
			.init_array	632	632	0	0.0
			.rodata	520213	520213	0	0.0
			.text	8877653	8877653	0	0.0
	chip-tool-ipv6only	arm64	(read only)	9799868	9799868	0	0.0
			(read/write)	473185	473185	0	0.0
			.bss	40625	40625	0	0.0
			.data	1128	1128	0	0.0
			.data.rel.ro	371960	371960	0	0.0
			.dynamic	560	560	0	0.0
			.got	55680	55680	0	0.0
			.init	24	24	0	0.0
			.init_array	192	192	0	0.0
			.rodata	495764	495764	0	0.0
			.text	8251428	8251428	0	0.0
	door-lock-app	debug	(read only)	2005113	2005113	0	0.0
			(read/write)	116832	116832	0	0.0
			.bss	47584	47584	0	0.0
			.data	992	992	0	0.0
			.data.rel.ro	62856	62856	0	0.0
			.dynamic	592	592	0	0.0
			.got	4120	4120	0	0.0
			.init	27	27	0	0.0
			.init_array	664	664	0	0.0
			.rodata	180988	180988	0	0.0
			.text	1674466	1674466	0	0.0
	lighting-app	debug+rpc	(read only)	2178761	2178761	0	0.0
			(read/write)	123792	123792	0	0.0
			.bss	48864	48864	0	0.0
			.data	1472	1472	0	0.0
			.data.rel.ro	67928	67928	0	0.0
			.dynamic	608	608	0	0.0
			.got	4168	4168	0	0.0
			.init	27	27	0	0.0
			.init_array	744	744	0	0.0
			.rodata	175164	175164	0	0.0
			.text	1844578	1844578	0	0.0
	ota-provider-app	debug	(read only)	1946497	1946497	0	0.0
			(read/write)	112560	112560	0	0.0
			.bss	47456	47456	0	0.0
			.data	1256	1256	0	0.0
			.data.rel.ro	58200	58200	0	0.0
			.dynamic	608	608	0	0.0
			.got	4376	4376	0	0.0
			.init	27	27	0	0.0
			.init_array	616	616	0	0.0
			.rodata	166987	166987	0	0.0
			.text	1627794	1627794	0	0.0
	ota-requestor-app	debug	(read only)	1973305	1973305	0	0.0
			(read/write)	115784	115784	0	0.0
			.bss	48448	48448	0	0.0
			.data	1448	1448	0	0.0
			.data.rel.ro	60424	60424	0	0.0
			.dynamic	592	592	0	0.0
			.got	4184	4184	0	0.0
			.init	27	27	0	0.0
			.init_array	640	640	0	0.0
			.rodata	162980	162980	0	0.0
			.text	1657698	1657698	0	0.0
	shell	debug	(read only)	2427657	2427657	0	0.0
			(read/write)	147272	147272	0	0.0
			.bss	67240	67240	0	0.0
			.data	784	784	0	0.0
			.data.rel.ro	73536	73536	0	0.0
			.dynamic	592	592	0	0.0
			.got	4152	4152	0	0.0
			.init	27	27	0	0.0
			.init_array	920	920	0	0.0
			.rodata	209362	209362	0	0.0
			.text	2061570	2061570	0	0.0
	thermostat-no-ble	arm64	(read only)	2262692	2262692	0	0.0
			(read/write)	148273	148273	0	0.0
			.bss	62753	62753	0	0.0
			.data	1024	1024	0	0.0
			.data.rel.ro	77000	77000	0	0.0
			.dynamic	560	560	0	0.0
			.got	4480	4480	0	0.0
			.init	24	24	0	0.0
			.init_array	360	360	0	0.0
			.rodata	139780	139780	0	0.0
			.text	1899600	1899600	0	0.0
	tv-app	debug	(read only)	2679225	2679225	0	0.0
			(read/write)	247744	247744	0	0.0
			.bss	164416	164416	0	0.0
			.data	3104	3104	0	0.0
			.data.rel.ro	74168	74168	0	0.0
			.dynamic	592	592	0	0.0
			.got	4552	4552	0	0.0
			.init	27	27	0	0.0
			.init_array	888	888	0	0.0
			.rodata	207157	207157	0	0.0
			.text	2297218	2297218	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2353636	2353636	0	0.0
			.bss	184652	184652	0	0.0
			.data	5752	5752	0	0.0
			.text	1316236	1316236	0	0.0
nrfconnect	all-clusters-app	nrf52840dk_nrf52840	(read/write)	1139467	1139467	0	0.0
			bss	142588	142588	0	0.0
			rodata	141588	141588	0	0.0
			text	780524	780524	0	0.0
p6	all-clusters-app	default	(read/write)	2493592	2493592	0	0.0
			.bss	118072	118072	0	0.0
			.data	2632	2632	0	0.0
			.text	1451856	1451856	0	0.0
	light-app	default	(read/write)	2396776	2396776	0	0.0
			.bss	111544	111544	0	0.0
			.data	2488	2488	0	0.0
			.text	1355040	1355040	0	0.0
	lock-app	default	(read/write)	2360312	2360312	0	0.0
			.bss	111288	111288	0	0.0
			.data	2448	2448	0	0.0
			.text	1318576	1318576	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	896954	896954	0	0.0
			bss	87444	87444	0	0.0
			noinit	37160	37160	0	0.0
			text	634304	634304	0	0.0