gerrit_util: work with all paths.
gerrit_util: work with all paths.

BUG=chromium:664664
TEST=local
  - Didn't work locally, now it does.

Change-Id: I5d470feda420342b0fb00a56e42a2b7d00257920
Reviewed-on: https://chromium-review.googlesource.com/411284
Reviewed-by: Aaron Gable <bbed39beedae4cdb499af742d2fcd6c63934d93b@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools