Don't return 1 when failing to add Gerrit CCs
Don't return 1 when failing to add Gerrit CCs

This causes other automated tooling to think that the entire
upload has failed, when really only a small part of it has.

BUG=666160

Change-Id: I0d646e77c54330d642097aebe70ec145ae291267
Reviewed-on: https://chromium-review.googlesource.com/412281
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Reviewed-by: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools