Roll src/third_party/skia 21950b9e9236..880b6ea52bf0 (1 commits) (#7860)

https://skia.googlesource.com/skia.git/%2Blog/21950b9e9236..880b6ea52bf0

git log 21950b9e92367948439000448e62079ccd5e84f1..880b6ea52bf00ea9621ee90e6b48f7fbc453fe8d --date=short --no-merges --format=%ad %ae %s
2019-02-17 skia-recreate-skps@skia-swarming-bots.iam.gserviceaccount.com Update SKP version

The AutoRoll server is located here: https://autoroll.skia.org/r/skia-flutter-autoroll

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

If the roll is causing failures, please contact the current sheriff (jvanverth@google.com), and stop
the roller if necessary.

DEPS

@@ -23,7 +23,7 @@ vars = {
   'fuchsia_git': 'https://fuchsia.googlesource.com',
   'github_git': 'https://github.com',
   'skia_git': 'https://skia.googlesource.com',
-  'skia_revision': '21950b9e92367948439000448e62079ccd5e84f1',
+  'skia_revision': '880b6ea52bf00ea9621ee90e6b48f7fbc453fe8d',
 
   # 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

-Signature: 755d3d0ade4e2b193839f37af2fe20d2
+Signature: fdad52cc7a1181ea7c03fa13bccd2cd1
 
 UNUSED LICENSES: