jenkins/build-seed: remove build directory

The seed script was not removing the build_dir between each
machine.  This causes the conf directory to have stale contents
from older machines and fail to build.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: Iad1990bd17532d57359c6a01032c7a18a4412ead
1 file changed