the build directory prerequisite was missing. As far as I know, it
didn't cause any issues, but it should still be there for correctness.
Signed-off-by: Maximilian Brune <maximilian.brune@9elements.com>
Change-Id: Ieba578871af2fe886def059ab1568b85cd641e6e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/87820
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@gmail.com>
502d19be89