libaudio: update to jb_rel_2.0.3

AU_LINUX_ANDROID_JB_REL_2.0.3.04.01.02.021.138

There's always some "secret" branch somewhere. :P

Change-Id: I6c29badf4afa817e09dbbb00904cffad9719e95f
libaudio: cleanup & use kernel headers

Change-Id: Ie60eb4a1691e5925d70c609f458f437c7f7f0eaf
audio_policy: possible fix for voip in hangouts

Change-Id: I6172b7c5bae70c620729401f4943f9811517e6be
update readme
add patches