Revert "Revert "place disable_ipv6 in the wlan0 folder""

I'm getting the following error:
E/CommandListener(   90): Failed to open /proc/sys/net/ipv6/conf/wlan0/disable_ipv6: No such file or directory

E/WifiStateMachine(  448): Failed to disable IPv6: java.lang.IllegalStateException: command '1 interface ipv6 wlan0 disable' failed with '400 1 Failed to change IPv6 state (No such file or directory)'

This reverts commit a41bf208221cd50d79865653af3a295c7f107897.
Force building of ril files
Swich libaudio for the one from msm7x27

http://git.cryptomilk.org/projects/marvel/android_device_htc_msm7x27-common.git