Since gclient automatically syncs this checkout when used,
have repo do the same for CrOS users.
Bug: 1148984
Test: ran and saw it auto-update when used externally
Test: ran and saw it not auto-update when used inside of a repo checkout
Change-Id: I56b9a45ef3a9ed501f6277e8f8357d4719cf2557
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2537164
Reviewed-by: Edward Lesmes <ehmaldonado@chromium.org>
Reviewed-by: Michael Mortensen <mmortensen@google.com>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Mike Frysinger