[V8] Add v8-waterfall-bot code

Bug: chromium:1469869
Change-Id: I5aac53bd7c93187200f3c3592a75110cd434759b
Reviewed-on: https://chromium-review.googlesource.com/c/infra/experimental/+/4849748
Reviewed-by: Leszek Swirski <leszeks@chromium.org>
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
1 file changed