2d6499c50 Roll fuchsia/sdk/core/mac-amd64 from Mzwf3... to c8UZM... (flutter/engine#10618) (#37561)

git@github.com:flutter/engine.git/compare/63b253d907b9...2d6499c50e34

git log 63b253d907b9..2d6499c50e34 --no-merges --oneline
2019-08-03 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from Mzwf3... to c8UZM... (flutter/engine#10618)

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

bin/internal/engine.version

-63b253d907b953d4b7b3e0039cddace54759d249
+2d6499c50e340dc541154b0e846204ea96dabd34