Fix hwconfig-list output formatting

[mikee47]

I'm getting this:

[mike@fedora Basic_Blink]$ make hwconfig-list

Basic_Blink: Invoking 'hwconfig-list' for Esp8266 (debug) architecture
Available configurations: \n   spiffs-2m                 /home/mike/sandboxes/sming2/Sming/spiffs-2m.hw \n   spiffs-two-roms           /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/spiffs-two-roms.hw \n   spiffs                    /home/mike/sandboxes/sming2/Sming/spiffs.hw \n   standard-4m               /home/mike/sandboxes/sming2/Sming/standard-4m.hw \n * standard                  /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/standard.hw \n   two-rom-mode              /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/two-rom-mode.hw

Should be like this:

[mike@fedora Basic_Blink]$ make hwconfig-list

Basic_Blink: Invoking 'hwconfig-list' for Esp8266 (debug) architecture
Available configurations: 
   spiffs-2m                 /home/mike/sandboxes/sming2/Sming/spiffs-2m.hw 
   spiffs-two-roms           /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/spiffs-two-roms.hw 
   spiffs                    /home/mike/sandboxes/sming2/Sming/spiffs.hw 
   standard-4m               /home/mike/sandboxes/sming2/Sming/standard-4m.hw 
 * standard                  /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/standard.hw 
   two-rom-mode              /home/mike/sandboxes/sming2/Sming/Arch/Esp8266/two-rom-mode.hw

[what-the-diff]

PR Summary

• Change printf to echo command
  The printf command was updated to use the echo command for displaying output.
• Add newline character
  A newline character is now added at the end of the output string, ensuring output messages appear on separate lines.