Roll SwiftShader from 554ce0027284 to 1ab775a9492b (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/554ce0027284..1ab775a9492b

2022-10-21 capn@google.com Rename EmitState to SpirvEmitter
2022-10-21 sugoi@google.com Fix shell.Exec calls in git.go

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: I89806485a78d6c0ce064374c26e1bff26b330c5b
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/106701
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Kokoro: Kokoro <noreply+kokoro@google.com>

DEPS

@@ -137,7 +137,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@554ce00272840d3afb1fbace3ac60f74eab2d12f',
+    'url': '{swiftshader_git}/SwiftShader@1ab775a9492b94994834c128355fd36a3fcb610b',
     'condition': 'dawn_standalone',
   },