Add resource audio for audio processing tests.

This is a prerequisite of:
http://review.webrtc.org/9919004/

TBR=bjornv
BUG=2894

Review URL: https://webrtc-codereview.appspot.com/12219004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/resources@5945 4adac7df-926f-26a2-2b94-8c16560cd09d
4 files changed