Roll engine 53bee4391ab5..42917704790d (2 commits) (#37748)

git@github.com:flutter/engine.git/compare/53bee4391ab5...42917704790d

git log 53bee4391ab5..42917704790d --no-merges --oneline
2019-08-06 skia-flutter-autoroll@skia.org Roll src/third_party/skia c853bf2867b9..ab961e9db1dd (10 commits) (flutter/engine#10669)
2019-08-06 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from kFlVe... to eB-F0... (flutter/engine#10668)

The AutoRoll server is located here: https://autoroll.skia.org/r/flutter-engine-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 (jimgraham@google.com), and stop
the roller if necessary.

bin/internal/engine.version

-53bee4391ab5fb323b9492d3c77c4e1010224621
+42917704790d29c1c52f371b397fd8bd7b259188