Add libasound source
Add audio_policy source
Add entries for audoi and libasound
Add libasound and audio_policy
disable_scissor_opt
Add cm gamma cal,colour cal,vibrationHW and LTO
Set BOARD_HARDWARE_CLASS
alsa-lib: prevent linker warning failing compile

Change-Id: Ib137bab5c43654f3a67fd06b3e9db40e4db5590a