Fix build error caused by missing btmacreader

Commit 19c2de909f584e989a7e1313a6208860c3d2ba29 removed dependency for btmacreader,
but it still tries to build it.

Change-Id: I22ed3f7216a53de6e1f872182d5df8381c0aad12
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_device_asus_grouper into kitkat