Roll Skia from 3c4759d04cf3 to a74ebc9bacbd (3 revisions)

https://skia.googlesource.com/skia.git/+log/3c4759d04cf3..a74ebc9bacbd

2022-06-30 kjlubick@google.com [bazel] Use exec_tools instead of tools for better RBE compatibility
2022-06-30 johnstiles@google.com Add unit test verifying int encoding of uniforms.
2022-06-30 bsalomon@google.com Revert "Add option to GrGpuBuffer::updateData to *not* discard non-updated area."

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 borenet@google.com,chinmaygarde@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://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

Author: skia-flutter-autoroll

DEPS

@@ -27,7 +27,7 @@ vars = {
   'skia_git': 'https://skia.googlesource.com',
   # OCMock is for testing only so there is no google clone
   'ocmock_git': 'https://github.com/erikdoe/ocmock.git',
-  'skia_revision': '3c4759d04cf36e4226919fee4f99708ec7150759',
+  'skia_revision': 'a74ebc9bacbdec3ff5cd2b634debbd06acfd29d2',
 
   # WARNING: DO NOT EDIT canvaskit_cipd_instance MANUALLY
   # See `lib/web_ui/README.md` for how to roll CanvasKit to a new version.

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 261182757d951c95ffb2754f5ab339e4
+Signature: 9bae7be8ab7c96924ae45c4b0cb06797
 
 UNUSED LICENSES: