Pull a minor update for GCC 8 compatibility. Change-Id: I0a4af47d56f3ca0b8ed82533e84c44041661ca35 Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/26306 Reviewed-by: Arthur Heymans <arthur@aheymans.xyz> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>