presubmit: enable branch check

We're moving the hardcoded check lists out of the pre-upload script.

BUG=chromium:466264
TEST=uploading a CL w/out a branch line is rejected
BRANCH=None

Change-Id: Ie51600cdc6a635ea925d3e329cdf310e487346ea
Signed-off-by: Mike Frysinger <vapier@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/260711
Reviewed-by: Randall Spangler <rspangler@chromium.org>
1 file changed