coreboot-sdk: Build Clang first in a separate step

If we build one of the `all*` targets, build Clang first. Compiling
Clang (just for the host arch, I assume) takes more than half of the
time of the default build. When run as a separate step, we can make
use of Docker's cache if any step after Clang fails.

Change-Id: If67b458cde656f1dc6774215f6a575a48d12b797
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/29455
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

0 files changed, 0 insertions, 0 deletions