buildgcc: Fail if a patch failed to apply

Otherwise one could end up with what they think is a coreboot toolchain
but in fact it'd be missing some patches.

Change-Id: Ic451f7061b822d0f4b64acc9976ba81fd544e85b
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/10487
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
1 file changed