msm7x27-common: cleaner ath6kl-compat building

Module now builds within $OUT tree.

Change-Id: Ib84b8a1b438d9408f310f7a96a5ea397d25a0ec8

Conflicts:
	BoardConfigCommon.mk
msm7x27-common: remove local loc_api code

We no longer need this, as the version in hardware/qcom/gps now
works with AMSS 50000.

Change-Id: I5214ac6c9eae053df4b2180a911ed7f61117582c