Roll SwiftShader from 938d3a1fac4d to a36600f98b9b (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/938d3a1fac4d..a36600f98b9b

2023-02-13 pkasting@chromium.org Compile in whatever C++ version is default.
2023-02-13 pkasting@chromium.org Fix build for C++20.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-dawn-autoroll
Please CC bajones@google.com,webgpu-developers@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in SwiftShader: https://bugs.chromium.org/p/swiftshader/issues/entry
To file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

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/main/autoroll/README.md

Bug: None
Tbr: bajones@google.com
Change-Id: I916ae60ab72039f210a91faed6170fda20cb0a0e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/119721
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -137,7 +137,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@938d3a1fac4deda77efb1c22c5e080ee4686eb0a',
+    'url': '{swiftshader_git}/SwiftShader@a36600f98b9b3aba2a8ed6f719476228af6449e2',
     'condition': 'dawn_standalone',
   },