Roll ANGLE from c0ef8ccfcd8b to d38b9f86ff8c (4 revisions)

https://chromium.googlesource.com/angle/angle.git/+log/c0ef8ccfcd8b..d38b9f86ff8c

2021-01-12 cnorthrop@google.com Allow GL_OES_shader_image_atomic when non-conformant
2021-01-12 jmadill@chromium.org Vulkan: Index mandatory support table by ANGLE format.
2021-01-12 syoussefi@chromium.org Vulkan: Increment buffer view serials only when used
2021-01-12 syoussefi@chromium.org Vulkan: Notify ContextVk when UtilsVk binds compute pipelines

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/angle-chromium-autoroll
Please CC timvp@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

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win-asan;luci.chromium.try:win_optional_gpu_tests_rel;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: timvp@google.com
Test: Test: Fortnite on ANGLE
Change-Id: I58180c4b2568a30fcb8d09172f89b12f878d315c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625565Reviewed-by: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: chromium-autoroll <chromium-autoroll@skia-public.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#842786}

DEPS

@@ -211,7 +211,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling ANGLE
   # and whatever else without interference from each other.
-  'angle_revision': 'c0ef8ccfcd8bd983dc3d7469e810ad133b80b4cd',
+  'angle_revision': 'd38b9f86ff8c57378ed2b301ad1f1b9ba80837ed',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.