Roll SwiftShader from b0e426fcf955 to eaf1c53544a7 (4 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/b0e426fcf955..eaf1c53544a7

2020-11-02 sugoi@google.com Merge changes If776b87d,I27098964
2020-11-02 capn@google.com Consistently remove double colon from llvm namespace
2020-11-02 capn@google.com Emulate gather/scatter for MSan builds
2020-11-02 capn@google.com Prevent 'most vexing parse' issue

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/+doc/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: I17d6d9b14f99d8d2ab717b811d90db4e6f6c75f6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2514510Reviewed-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@{#823313}

DEPS

@@ -222,7 +222,7 @@ 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': 'b0e426fcf95534d1bbba97b046437bbdf3cfd5b4',
+  'swiftshader_revision': 'eaf1c53544a7ffe2c7716246ceb2dce315639733',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.