Roll src/third_party/skia 71a23d4..e1f5b64 (8 commits) (flutter#8004)

https://skia.googlesource.com/skia.git/%2Blog/71a23d4195d9..e1f5b644656f

git log 71a23d4..e1f5b64 --date=short --no-merges --format=%ad %ae %s
2019-03-01 [email protected] Roll third_party/externals/swiftshader a192473..dd1e37e (1 commits)
2019-02-28 [email protected] Clean up SkFontMgr_fuchsia.cpp after FIDL API change
2019-03-01 [email protected] fix docs for fitsInBytes
2019-03-01 [email protected] [canvaskit] Roll 0.4.1
2019-03-01 [email protected] fix labels in P3 gm
2019-02-28 [email protected] Add GrMtlPipelineStateCache.
2019-03-01 [email protected] [canvaskit] Ignore image paths in Skottie asset keys
2019-03-01 [email protected] Roll third_party/externals/angle2 5546fb4..1581ff0 (2 commits)

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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 ([email protected]), and stop
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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': '71a23d4195d96dbf200fbf10fb887dbcc83bd1da',
+  'skia_revision': 'e1f5b644656fc38d4784d12e174a5f8bdbab7538',
 
   # 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: c82fdb93a1014dcf85c470bff90ccc4b
+Signature: 9fe2814b76fdfc922c7db5e725e33d37
 
 UNUSED LICENSES: