Roll SwiftShader from 8ccc63f045d5 to 0915ab4bddf7 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/8ccc63f045d5..0915ab4bddf7

2022-02-08 capn@google.com Fix validation layer error for ClearImage benchmarks
2022-02-08 capn@google.com Fix non-x86 build of LLVM Reactor

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 amaiorano@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: amaiorano@google.com
Change-Id: I25256077df04c9886794c9d90d67877d8b6e6cda
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/79880
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@8ccc63f045d5975fb67f9dfd3d2b8235b0526990',
+    'url': '{swiftshader_git}/SwiftShader@0915ab4bddf7af616d3882884c5c056442f063a5',
     'condition': 'dawn_standalone',
   },