Switch to CM's repo for htc_msm8960-common

PAC-HTC is out of date with CM and looks like it is no longer being
actively maintained. There is a redundant sepolicy that is cauing build
fails for all devices using the current repo.

Change-Id: Idf5a9c2636494b653e954e67ddb1e0836bf8f69b
Signed-off-by: Tianrui Guo <tianrui@pac-rom.com>