ckport database for opus library

I attach a ckport database file for the new opus library. it should be installed to $PREFIX_LIB/ckport/db/.

I have not yet compiled or tested the library. Feel free to correct the file. The infos are extracted directly from src/opus.h

I marked opus_(en|de)coder_init() as internal because exporting opus_(en|de)coder_init() seems to be useless without exporting opus_(en|de)coder_get_size() as well. If that is wrong please clarify in this ticket and downgrade from 'internal' to 'likely', 'maybe' or 'ok' in the database file.