[autotest] Don't run build externals from drone_utility.
It takes ~30 minutes on a loaded drone. Changes that require build
externals can have the sheriff do so out of band with the scheduler.
BUG=chromium:385806
TEST=Started the scheduler
DEPLOY=Scheduler
Change-Id: I652373a9d0fde7c13d88bd4001e7263d5b2411c1
Reviewed-on: https://chromium-review.googlesource.com/204373
Tested-by: Prashanth B <beeps@chromium.org>
Commit-Queue: Prashanth B <beeps@chromium.org>
Reviewed-by: Alex Miller <milleral@chromium.org>
1 file changed