Roll SwiftShader from fc40ddd2a901 to b21967ee088b (1 revision)

https://swiftshader.googlesource.com/SwiftShader.git/+log/fc40ddd2a901..b21967ee088b

2022-03-08 nicolascapens@google.com Merge changes Id0d4524c,Ife5beff3

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 lokokung@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: lokokung@google.com
Change-Id: I548f866569f667fcc63bb6fb3f3a896d4808fd96
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/83021
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@fc40ddd2a9017ff0499c4b7b62af114907b1dc10',
+    'url': '{swiftshader_git}/SwiftShader@b21967ee088b1fc420c1856389a8d739126479eb',
     'condition': 'dawn_standalone',
   },