Roll Skia from 7225788 to 8e77631 (8 revisions) (#20184)

https://skia.googlesource.com/skia.git/+log/7225788b9070..8e77631a80f0

2020-07-31 borenet@google.com Remove some non-inclusive language in recipes
2020-07-31 scroggo@google.com Remove "sanity"/"insane" to comply with Android's inclusive language guidance
2020-07-31 scroggo@google.com Remove "dummy" to comply with Android's inclusive language guidance
2020-07-31 jdapena@igalia.com GCC: fix type passed to vcvt_f32_f16 to be a float16x4_t in SkVx.h
2020-07-31 scroggo@google.com Remove "Cripple" to comply with Android's inclusive language guidance
2020-07-31 fmalita@chromium.org Fix path builder initial gen ID
2020-07-31 ethannicholas@google.com Fixed nondeterminism in SkSL dehydration
2020-07-31 robertphillips@google.com Handle null GrDirectContext in DDL Fuzzer

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 on the revert to ensure that a human
is aware of the problem.

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/master/autoroll/README.md

Author: skia-flutter-autoroll

DEPS

@@ -26,7 +26,7 @@ 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': '7225788b9070b126dc47142c1d82dd7c54f77c9d',
+  'skia_revision': '8e77631a80f09ef22222330599a2acbe89fb0446',
 
   # When updating the Dart revision, ensure that all entries that are
   # dependencies of Dart are also updated to match the entries in the

ci/licenses_golden/licenses_skia

@@ -1,4 +1,4 @@
-Signature: 6eefbf7a2aacebc79a8ca529000a86b9
+Signature: 971bdf525d6d356dc41f0eb6c3848846
 
 UNUSED LICENSES: