Roll engine b6b54fd60631..b0d2caceab25 (2 commits) (#45564)

git@github.com:flutter/engine.git/compare/b6b54fd60631...b0d2caceab25

git log b6b54fd60631..b0d2caceab25 --first-parent --oneline
2019-11-25 skia-flutter-autoroll@skia.org Roll fuchsia/sdk/core/mac-amd64 from Q9HKI... to 1nxSz... (#13995)
2019-11-25 30870216+gaaclarke@users.noreply.github.com Removed auto roll commits from auto_assign. (#13992)


If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/flutter-engine-flutter-autoroll
Please CC aaclarke@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

bin/internal/engine.version

-b6b54fd60631a3828c2e2c9b079b5d1d2d8c8c37
+b0d2caceab254961e4542aef81a077fecd08b9be