am 468432c0: Include the framework copy of the OpenMAX headers instead of referencing external/opencore.

Merge commit '468432c09856425b72214e2b6682800bf17f5b22' into gingerbread-plus-aosp

* commit '468432c09856425b72214e2b6682800bf17f5b22':
  Include the framework copy of the OpenMAX headers instead of referencing external/opencore.