GitLab

Configure them to:
1. run on any changes to //chrome/updater.
2. list under `Choose Tryjobs` for luci.chromium.try

Bug: 1120836
Change-Id: I519c632b6b99fa41f256b2f6a70d8e300f4941a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2536032
Commit-Queue: Anjali Doneria <adoneria@google.com>
Reviewed-by: Garrett Beaty <gbeaty@chromium.org>
Cr-Commit-Position: refs/heads/master@{#827428}