tree ab00b5a48c6657c55d2a9fb5d370f8788c9668bb
parent 3afbf3fba23b21a8808e080292cb3adbf75271c8
author Tom Finegan <tomfinegan@google.com> 1512151733 -0800
committer Tom Finegan <tomfinegan@google.com> 1512234761 +0000

OBU type/metadata disambiguation.

- OBU_TD => OBU_TEMPORAL_DELIMITER
- METADATA_TYPE => OBU_METADATA_TYPE
- Prefix OBU_METADATA_TYPE enum vals with "OBU_".

BUG=aomedia:1046

Change-Id: I0c63d36b77905520e427e6b77fbf4cbedabc7e51