Roll SwiftShader from 952149303d06 to 51b03d58fb17 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/952149303d06..51b03d58fb17

2020-10-09 bclayton@google.com SpirvShaderDebugger: Fix store() of arrays
2020-10-09 bclayton@google.com SpirvShaderDebugger: Improve ASSERT() messages

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: I8239f8698386ccf8183d55249328c1b9b6e7c129
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2462780Reviewed-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@{#815546}

DEPS

@@ -211,7 +211,7 @@ 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': '952149303d06de35920f1a3913217f572a3f611c',
+  'swiftshader_revision': '51b03d58fb17b09120c886d5df36fb191d12fa8e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling PDFium
   # and whatever else without interference from each other.