These two tests are causing the driver internally to OOM.

dEQP-GLES3.functional.multisample.fbo_max_samples.constancy_sample_coverage_inverted
dEQP-GLES3.functional.multisample.fbo_max_samples.constancy_both

Bug: angleproject:5162
Change-Id: I6960b4b171efb2f74b42a82d8ecafce1edb167c1
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2469958
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>