With the combination of the WATCHLISTS feature and
create_release.py it is possible to notify the
mailing list v8-merges@googlegroups.com on pending
merges.

On master this notification is deactivated.

R=machenbach@chromium.org
NOTRY=true

Review URL: https://codereview.chromium.org/1663003003

Cr-Commit-Position: refs/heads/master@{#33719}