Roll SwiftShader from 6517262b2386 to db6433790af5 (4 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/6517262b2386..db6433790af5

2022-08-26 capn@google.com Compute fragment coordinates for wider SIMD groups
2022-08-26 capn@google.com Rename pixel coordinate variables
2022-08-26 capn@google.com Compute relative fragment coordinates just once
2022-08-26 capn@google.com Compute the primitive's origin coordinates only once

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 rharrison@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: rharrison@google.com
Change-Id: I4e640435f9643126013360a046d05fa87f56754a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/100540
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -134,7 +134,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@6517262b2386152d09411a3ae8d5494ba89d7526',
+    'url': '{swiftshader_git}/SwiftShader@db6433790af50c1392147d41d91db094beb2e0c2',
     'condition': 'dawn_standalone',
   },