The message was previously not clear that if the entire CL has any change
to an OWNERS file, TBR will not apply.

Change-Id: Ib30a93f80196f45b02a29701faab7cf581e37f50
Reviewed-on: https://chromium-review.googlesource.com/1176321Reviewed-by: Marc-Antoine Ruel <maruel@chromium.org>
Commit-Queue: Robert Sesek <rsesek@chromium.org>