Roll SwiftShader from 23e97b79fb91 to 3076b4c0d8ce (3 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/23e97b79fb91..3076b4c0d8ce

2023-04-25 natsu@google.com Add back arm files to only arm targets
2023-04-25 natsu@google.com Split LLVM16 srcs based on target.
2023-04-25 natsu@google.com Fix "multiple rules generate <>.o"

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 enga@google.com,webgpu-developers@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: enga@google.com
Change-Id: I93085d6eb0f47bb4d6657491a15511f35f0df618
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/129320
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -141,7 +141,7 @@ deps = {
   },
 
   'third_party/swiftshader': {
-    'url': '{swiftshader_git}/SwiftShader@23e97b79fb9193bf88e79c16c6a577c680edb2d6',
+    'url': '{swiftshader_git}/SwiftShader@3076b4c0d8cec6c15dbbdc180c8c463341365780',
     'condition': 'dawn_standalone',
   },