Roll SwiftShader from d15c42482560 to 620982155d55 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/d15c42482560..620982155d55

2022-04-11 capn@google.com Work around MSan false positives for Reactor routine parameters
2022-04-11 capn@google.com Pass RoutineT::operator() parameters by value

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 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: I84ab9983f0c3b2c35fb79c31728db7fb3584267f
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86261
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -132,7 +132,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@d15c42482560fba311e3cac90203438ad972df55',
+    'url': '{swiftshader_git}/SwiftShader@620982155d559292506609903880f00014e0f546',
     'condition': 'dawn_standalone',
   },