Roll src/third_party/swiftshader ef55c4e738de..31edef751a8d (1 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/ef55c4e738de..31edef751a8d

git log ef55c4e738de..31edef751a8d --date=short --no-merges --format='%ad %ae %s'
2019-11-09 chrisforbes@google.com Update deqp to vulkan-cts-1.1.6.1

Created with:
  gclient setdep -r src/third_party/swiftshader@31edef751a8d

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-chromium-autoroll
Please CC swiftshader-team+autoroll@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/+/master/autoroll/README.md

CQ_INCLUDE_TRYBOTS=luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_chromium_msan_rel_ng;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=swiftshader-team+autoroll@google.com

Bug: chromium:b/144183516
Change-Id: I1eff80dfdda06366ab637e54767f7e80577fdfcf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1906323Reviewed-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@{#714063}

DEPS

@@ -188,7 +188,7 @@ 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': 'ef55c4e738de0e55680bb9e515c9f6e91ecf386f',
+  'swiftshader_revision': '31edef751a8d8428db1fc9e0f68c345ab987811f',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.