Roll SwiftShader from a6ca3d4c0ccd to b75ca3758a80 (3 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/a6ca3d4c0ccd..b75ca3758a80

2021-08-31 jmadill@chromium.org Increase maxComputeSharedMemorySize.
2021-08-31 tikuta@google.com update angle revision
2021-08-30 srisser@google.com Turn BC6 constructors into constexpr

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/swiftshader-angle-autoroll
Please CC geofflang@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 ANGLE: https://bugs.chromium.org/p/angleproject/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: geofflang@google.com
Change-Id: I1f62fcfd40eda7beb0081b2ad475d72e29b7831b
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3135218
Commit-Queue: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
Bot-Commit: angle-autoroll <angle-autoroll@skia-public.iam.gserviceaccount.com>
diff --git a/DEPS b/DEPS
index 8a0d46a..f445ff9 100644
--- a/DEPS
+++ b/DEPS
@@ -491,7 +491,7 @@
   },
 
   'third_party/SwiftShader': {
-    'url': '{swiftshader_git}/SwiftShader@a6ca3d4c0ccdac078ac2c0e0b80efc9ee16a31e0',
+    'url': '{swiftshader_git}/SwiftShader@b75ca3758a8091cd6a4053b5ac2bd097e864bf1e',
     'condition': 'not build_with_chromium',
   },