Roll src/third_party/skia c1a9feb6f06e..5800f2e8a920 (2 commits) (#8022)

https://skia.googlesource.com/skia.git/%2Blog/c1a9feb6f06e..5800f2e8a920

git log c1a9feb6f06edc41cce044b7da4f5e4a2e5055a5..5800f2e8a920ed57c66cde8f6f29c1af376e7661 --date=short --no-merges --format=%ad %ae %s
2019-03-03 reed@google.com Reland "use colorspace steps to determine legacy blits"
2019-03-03 reed@google.com Reland "bring back lowp bilerp_clamp_8888"

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 (reed@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': 'c1a9feb6f06edc41cce044b7da4f5e4a2e5055a5',
+  'skia_revision': '5800f2e8a920ed57c66cde8f6f29c1af376e7661',
 
   # 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: 6c7bb3eabee8dc2bd7a4d99b27f9adb4
+Signature: c3fc29250d07962ef7acf39c704bd8e8
 
 UNUSED LICENSES: