Roll src/third_party/angle/ e943df226..21386a349 (2 commits)

https://chromium.googlesource.com/angle/angle.git/+log/e943df226e2b..21386a349acc

$ git log e943df226..21386a349 --date=short --no-merges --format='%ad %ae %s'
2018-05-16 jmadill dEQP: Implement --deqp-case for GTest.
2018-05-10 lucferron Vulkan: Basic support of copySubImage

Created with:
  roll-dep src/third_party/angle


The AutoRoll server is located here: https://angle-chromium-roll.skia.org

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

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.


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_optional_gpu_tests_rel
TBR=ynovikov@chromium.org

Change-Id: I0354711b842de67f4117ced9535b5cc46e80edb1
Reviewed-on: https://chromium-review.googlesource.com/1062586Reviewed-by: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Commit-Queue: angle-chromium-autoroll <angle-chromium-autoroll@skia-buildbots.google.com.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#559305}

DEPS

@@ -108,7 +108,7 @@ 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': 'e943df226e2b6e5361d38211d672c8e39156832f',
+  'angle_revision': '21386a349acc33162f460c506ffae9478e5e27ff',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling build tools
   # and whatever else without interference from each other.