Experimenting with ALSA audio routing

* This is WIP. Gingerbread FM stack app uses ALSA to route audio
  see if we can use ALSA for the V4L2 based FM app to route aud-
  io aswell.
* Mkfiles will need to get changed to include the proper libs.

Change-Id: I731658cc0659c08c505a68c99b0aee559311f196