cm: Build the BluetoothExt package

 * This package contains Bluetooth profiles implemented by Qualcomm on
   top of Bluedroid.
 * Currently contains support for MAP and FTP profiles.
 * Also included is BTC for wlan coex on QC chipsets.

Change-Id: I933b14de4576691c31087c9de4d60f21cbe3678b
Merge branch 'cm-10.2' of https://github.com/CyanogenMod/android_vendor_cm into cm-10.2