Roll SwiftShader from fab1949ad09f to 6f73609d079a (4 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/fab1949ad09f..6f73609d079a

2022-12-07 sugoi@google.com Add missing include <string>
2022-12-07 sugoi@google.com Add early exits for OOB index buffer offset or first index
2022-12-07 sugoi@google.com Fix VK_EXT_graphics_pipeline_library related crash
2022-12-07 sugoi@google.com Fix Regres false crash reports

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 senorblanco@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: senorblanco@google.com
Change-Id: I493540e2491c2dea0ba2012568c400f822799bc1
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/113361
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -137,7 +137,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@fab1949ad09f24f39108e1281bc1268844e65085',
+    'url': '{swiftshader_git}/SwiftShader@6f73609d079a320c1d3a00475ba9c30fafeccec9',
     'condition': 'dawn_standalone',
   },