These builders are replacing the old standalone builders and the old
compile-only builders. They should be much faster. They also can be
extended in the future when we support running tests from ANGLE
standalone.

Bug: chromium:833999
Change-Id: Ice44c0fb8cb32d8be573f81d5df858509b00a107
Reviewed-on: https://chromium-review.googlesource.com/1049959Reviewed-by: Jamie Madill <jmadill@chromium.org>