ghost: Label modem partition as firmware

Change-Id: Ib8294d4da609e56438a3294785baee06ac5c3439
ghost: Add device-specific SELinux policies

Change-Id: Ic368cecd7e95c61c42ed290b5f47d3e845d50359
Merge commit 'refs/changes/61/79461/2' of http://review.cyanogenmod.org/CyanogenMod/android_device_motorola_ghost into 5.0