Add missing paths to common tests cflags and remove these paths from individual tests configuration. Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Change-Id: I13cb336195bfb06b861d7f403822f06bec8a40aa Reviewed-on: https://review.coreboot.org/c/coreboot/+/56933 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>