Add coreboot build tests after running the toolchain build. This
verifies that everything still builds with the new toolchain.
Change-Id: Ifa51db897925c0b77791c83bbcbfd75045c907b5
Signed-off-by: Martin Roth <martinroth@google.com>
Reviewed-on: https://review.coreboot.org/14156
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)