[autoroll] Add email notifications for Swiftshader -> Chromium roller
[autoroll] Add email notifications for Swiftshader -> Chromium roller

Bug: skia:8801
Change-Id: I713110e23af910fe1326d05e79a40fb7ae247f28
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/197123
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot