Roll SwiftShader from c36237ddec24 to be3a0de27683 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/c36237ddec24..be3a0de27683

2022-01-20 bclayton@google.com BUILD.gn: Remove VK_USE_PLATFORM_XCB_KHR define
2022-01-20 capn@google.com Remove heap size padding

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 bclayton@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: bclayton@google.com
Change-Id: Ied068c11ea246e4f39a5ad69077f03d8d5481c03
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/77460
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -133,7 +133,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@c36237ddec24490d5f704f836d18de722d05187c',
+    'url': '{swiftshader_git}/SwiftShader@be3a0de27683c76cdee07a0f5556faa0930d3ec1',
     'condition': 'dawn_standalone',
   },