bluetooth: bring build config in line with CAF

* remove redundant flags

reference : https://github.com/CyanogenMod/android_device_motorola_msm8226-common/commit/76ac09c31c0f4b9f41272e09b174ff6b1ec9b719

Change-Id: I6593399681abd3d088f8133fb0c139e5d3c2e14e
Merge branch 'cm-12.0' of https://github.com/k2wlxda/android_device_motorola_titan into cm-12.0

Conflicts:
	BoardConfig.mk
	bluetooth/bdroid_buildcfg.h

Change-Id: Ia01a8464fda6e71f6c5424869968345080cd9749