manifesto: add manifest file for audio
manifesto: add manifest file for audio

Add example manifest file for audio.

Signed-off-by: Vaibhav Agarwal <d2b1f688be96458fbe6eb8ddf2edcaabc2278f57@linaro.org>
Reviewed-by: Viresh Kumar <5ff32272b3d9f86512eddc8e0af523fc6f7924e5@linaro.org>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@google.com>

projectara/manifesto,gregkh/manifesto,ChrisMyerchin/manifesto