msm8960: libril: handle HTC signal format in libril entirely

This allows all MSM8960/APQ8064 HTC devices to use the standard RIL.java
radio class.

Change-Id: I59af03b989c092f532d0d11a4779acf6e2aad04f
msm8960-common: ril: update libril from hardware/ril/libril

Change-Id: I39571d6ad8514845f6237ef73f7293e1da6d30e8
msm8960-common: ril: use custom HTC RIL class

Use modified HTC RIL class across all devices.

Change-Id: I07b4f3a18ee2acca4c3ce5af2220a4f44fd56dc3