board_status: Abort if repository is in a dirty state

Run `git status` to let the user spot what is going on.

Change-Id: I154d964354872f922cd22b05a5d2231ca2504f25
Signed-off-by: Paul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/22016
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
1 file changed