Roll Skia from a058f601e1fb to c6cf8be050c0 (2 revisions) (flutter/engine#53132)

https://skia.googlesource.com/skia.git/+log/a058f601e1fb..c6cf8be050c0

2024-05-30 egdaniel@google.com [Graphites] Use SkTo in recent Vulkan DescSet change.
2024-05-30 egdaniel@google.com [Graphite] Fix crashes in Dawn Viewer context destruction.

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/skia-flutter-autoroll
Please CC brianosman@google.com,bwils@google.com,jacksongardner@google.com,rmistry@google.com on the revert to ensure that a human
is aware of the problem.

To file a bug in Skia: https://bugs.chromium.org/p/skia/issues/entry
To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

DEPS

@@ -14,7 +14,7 @@ vars = {
   'flutter_git': 'https://flutter.googlesource.com',
   'skia_git': 'https://skia.googlesource.com',
   'llvm_git': 'https://llvm.googlesource.com',
-  'skia_revision': 'a058f601e1fb4c62e53eb034900d68e3959e52ae',
+  'skia_revision': 'c6cf8be050c0796addd91ee20e3c6adc879a7221',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

engine/src/flutter/ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 16ca0c8c596560a58edb3e913d43cb2e
+Signature: 3618d870fdfa25e1084c0fb91994f681
 
 ====================================================================================================
 LIBRARY: etc1