Register v8/v8 in gclient for trying Gerrit v8 patches on chromium trybots.
Register v8/v8 in gclient for trying Gerrit v8 patches on chromium trybots.

R=76cc7f10de6bc994d83c4cb09072e4590b82b709@chromium.org
BUG=685318

Change-Id: I61192392eec98ad6b9a32ef933f2d22cf2aedd0e
Reviewed-on: https://chromium-review.googlesource.com/435318
Commit-Queue: Andrii Shyshkalov <a30c74fa30536fe7ea81ed6dec202e35e149e1fd@chromium.org>
Commit-Queue: Michael Achenbach <76cc7f10de6bc994d83c4cb09072e4590b82b709@chromium.org>
Reviewed-by: Michael Achenbach <76cc7f10de6bc994d83c4cb09072e4590b82b709@chromium.org>

CoherentLabs/depot_tools,CoherentLabs/depot_tools