https://chromium.googlesource.com/external/github.com/KhronosGroup/Vulkan-ValidationLayers.git/+log/6b0de7007af5..1980311465cf

2020-08-13 sam.walls@arm.com tests: Add tests for index-buffer fix
2020-08-13 sam.walls@arm.com practices: Fix index-buffer bug in Arm best practices

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/vulkan-validation-layers-angle-autoroll
Please CC ynovikov@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Bug: None
Tbr: ynovikov@google.com
Change-Id: I9f3cd14ee51b79eab0005e85c400796242868e05
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2355579Reviewed-by: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>