Integrate yocto-install/disable-serial-console

Commit: seco-ne/tools/yocto-install@f3092b09

Add initial version of script for enabling and disabling console in FNGS

This is a part of the fix for issue [746-000797] Flash-N-Go System: Implement "Disable serial console"

Run with --disable-console argument to disable console in boot-alt.cfg. Run with --enable-console argument to enable console in boot-alt.cfg.

Example: fngsystem-console-update.sh --disable-console

Signed-off-by: Dmitry Petrov dmitry.petrov@rtsoft.de