am aeb2bbc1: am 200f2598: Build without OpenCore by default, remove obsolete opt-in to stagefright.

Merge commit 'aeb2bbc140acfbaa8279f704fd7fc3f4d08c9486'

* commit 'aeb2bbc140acfbaa8279f704fd7fc3f4d08c9486':
  Build without OpenCore by default, remove obsolete opt-in to stagefright.