util/lint: Add check to verify saved configs are miniconfigs

Change-Id: Ifc5ec645dd27663c1b1fde9ff16d48534606a554
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/17600
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins)
1 file changed