3c37d735a Update license script to handle ANGLE (flutter/engine#10782) (#38507)

git@github.com:flutter/engine.git/compare/fec1c92f8fc9...3c37d735a8d6

git log fec1c92f8fc9..3c37d735a8d6 --no-merges --oneline
2019-08-14 stuartmorgan@google.com Update license script to handle ANGLE (flutter/engine#10782)

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 (stuartmorgan@google.com), and stop
the roller if necessary.

bin/internal/engine.version

-fec1c92f8fc96eb29e121f1302a8dcdc5d6e8595
+3c37d735a8d665d9bb10529842256eb8848241f9