am 81a6bcd2: [audio][spdif] Add spdif AC3 make to audio_utils make

* commit '81a6bcd24e51cab0748eb5cc2a27ff2c0f6d8c23':
  [audio][spdif] Add spdif AC3 make to audio_utils make
tree: 7101c2b994bd7182675fad55262bca3bac520124
  1. audio_effects/
  2. audio_route/
  3. audio_utils/
  4. camera/
  5. private/
  6. CleanSpec.mk