graphics_GLBench: relax bvt requirements.

Due to major changes in how the test is run (waffle, platform_null),
relax failure conditions of GLBench in the cq for now. This should
be reverted once all images are updated and the test has shown to be
stable.

BUG=chromium:469861
TEST=pylint

Change-Id: Id7845edd3bf13f223e0b881b644a8d008c5ec7f1
Reviewed-on: https://chromium-review.googlesource.com/263120
Commit-Queue: Ilja Friedel <ihf@chromium.org>
Tested-by: Ilja Friedel <ihf@chromium.org>
Reviewed-by: Haixia Shi <hshi@chromium.org>
3 files changed