Roll engine 4b76fadbf438..7c80d62e89f6 (5 commits) (#43920)

git@github.com:flutter/engine.git/compare/4b76fadbf438...7c80d62e89f6

git log 4b76fadbf438..7c80d62e89f6 --no-merges --oneline
2019-10-31 iska.kaushik@gmail.com CIPD needs the directory to be relative (flutter/engine#13461)
2019-10-31 1541038+josh-ksr@users.noreply.github.com Force orientation change when current orientation not allowed on iOS (flutter/engine#13170)
2019-10-31 jason-simmons@users.noreply.github.com Duplicate the directory fd in fml::VisitFiles (flutter/engine#13448)
2019-10-31 amirh@users.noreply.github.com Fix iOS crash when multiple platform views are in the scene (flutter/engine#13449)
2019-10-30 skia-flutter-autoroll@skia.org Roll src/third_party/skia 7df14d055703..549325c87e9d (11 commits) (flutter/engine#13447)


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 cbracken@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

-4b76fadbf43885ea11073cfe56cc94c35e02f332
+7c80d62e89f6f41a9d0f32e49b2b18f5270f4f03