Roll src/third_party/swiftshader 96fbe0810a3f..a16238df3f28 (3 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/96fbe0810a3f..a16238df3f28


git log 96fbe0810a3f..a16238df3f28 --date=short --no-merges --format='%ad %ae %s'
2019-04-19 chrisforbes@google.com Add support for OpAtomicCompareExchange
2019-04-19 chrisforbes@google.com Add support atomic instructions as used with storage images
2019-04-19 chrisforbes@google.com Add support for OpImageTexelPointer


Created with:
  gclient setdep -r src/third_party/swiftshader@a16238df3f28

The AutoRoll server is located here: https://autoroll.skia.org/r/swiftshader-chromium-autoroll

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

BUG=chromium:b/130768731,chromium:b/127472316,chromium:b/130768731,chromium:b/127472316,chromium:b/130768731
TBR=swiftshader-team+autoroll@chromium.org

Change-Id: I176d249ff7276933d0a27012a78d280db710657b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1575358Reviewed-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@{#652466}

DEPS

@@ -145,7 +145,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling SwiftShader
   # and whatever else without interference from each other.
-  'swiftshader_revision': '96fbe0810a3fc9b4982d24b6c2c6b04642598e15',
+  'swiftshader_revision': 'a16238df3f28a0d92947654b40f33cfd9a491b72',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.