Add blink-reviews-bindings to 'bindings' watchlist
Add blink-reviews-bindings to 'bindings' watchlist

Add new mailing list to WATCHLISTS, per:
[blink-dev] PSA: New mailing lists for blink code reviews in specific directories
https://groups.google.com/a/chromium.org/d/topic/blink-dev/iRwYI7KTEeA/discussion

R=haraken
NOTRY=true

Review URL: https://codereview.chromium.org/261463004

git-svn-id: bf5cd6ccde378db821296732a091cfbcf5285fbd@172942 bbb929c8-8fbe-4397-9dbb-9b2b20218538

primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs,primiano/blink-gitcs