add Mac OpenCL bots

Change-Id: Ib078676bfe4de033c878f3007b4581d37e7b759b
Reviewed-on: https://skia-review.googlesource.com/c/191288
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed