Add SingleProcessMash unit_tests to buildbots, with filter file

Bug: 905430
Change-Id: Ie6a7886a351c0ea75c92947bc5a7829762e8bd8c
Reviewed-on: https://chromium-review.googlesource.com/c/1355759
Commit-Queue: Scott Violet <sky@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#613418}
3 files changed