Roll src/third_party/swiftshader 63ed0e445fa5..1cba0a9c3a8a (6 commits)

https://swiftshader.googlesource.com/SwiftShader.git/+log/63ed0e445fa5..1cba0a9c3a8a

git log 63ed0e445fa5..1cba0a9c3a8a --date=short --first-parent --format='%ad %ae %s'
2020-04-08 bclayton@google.com Regres: Post coverage results even if the test lists have not changed.
2020-04-08 amaiorano@google.com CMake: split out all src/OpenGL targets into their own CMakeLists
2020-04-08 amaiorano@google.com CMake: split out SwiftShader GL deps into separate files
2020-04-08 amaiorano@google.com CMake: clean up dependencies
2020-04-08 bclayton@google.com Add SystemBenchmarks.
2020-04-08 bclayton@google.com VkCommandBuffer: Remove static Cast() method

Created with:
  gclient setdep -r src/third_party/swiftshader@1cba0a9c3a8a

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;luci.chromium.try:linux-swangle-try-x64;luci.chromium.try:win-swangle-try-x86
Bug: None
Tbr: swiftshader-team+autoroll@google.com
Change-Id: Ia7f87d05a2e8d10e8a6fc53b6acecbb05a4c7fa6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2142209Reviewed-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@{#757596}

DEPS

@@ -191,7 +191,7 @@ 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': '63ed0e445fa525ee01637350ea92fbdaa2226c73',
+  'swiftshader_revision': '1cba0a9c3a8a1961514ac63cd3091c1a376fe84a',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.