Roll SwiftShader from bcbc10b1bed4 to ff8cc02ea659 (2 revisions)

https://swiftshader.googlesource.com/SwiftShader.git/+log/bcbc10b1bed4..ff8cc02ea659

2022-12-22 nicolas.capens@gmail.com Remove VK_LUNARG_direct_driver_loading from supported extensions
2022-12-22 nicolas.capens@gmail.com Support LLVM 16+ API change

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 jrprice@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: jrprice@google.com
Change-Id: Icc7b237e4052db190793ec9aa9e11c26650aff93
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/115367
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@bcbc10b1bed498c81d9f7fc801e14635e821cc7c',
+    'url': '{swiftshader_git}/SwiftShader@ff8cc02ea659b8d64cf45f2cdd425ee293ddac03',
     'condition': 'dawn_standalone',
   },