Add graphics_PiglitBVT tests to bvt_cq suite so they can run on CQ

BUG=None
TEST=None

Change-Id: Ib3cfe34f7f657b8837e7e1a93efb1fbe7193c421
Reviewed-on: https://chromium-review.googlesource.com/200761
Tested-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Prashanth B <beeps@chromium.org>
Reviewed-by: Alex Miller <milleral@chromium.org>
Reviewed-by: Ilja Friedel <ihf@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
21 files changed