dumpe2fs: add support for LABEL= and UUID= specifiers for the device #140

Job	Run time
Build and test with ASAN enabled	1m 36s
Cross-compile for Android (aarch64)	35s
Build and test with clang	1m 13s
Build and test with gcc	57s
Cross-compile for Android (armv7a)	40s
Cross-compile for Android (i686)	48s
Build and test with gcc -m32	1m 11s
Cross-compile for Android (x86_64)	29s
Build and test on macOS	1m 35s
Build and test with UBSAN enabled	1m 23s
Build mke2fs on Windows with mingw32	2m 0s
Build mke2fs on Windows with mingw64	1m 59s
	14m 26s

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