msm7x27-common: update loc_api code & disable verbose logging

Modified libloc_api-rpc code to use generic loc_api_sync_call
code. The gen-50000 version was outdated, missing this commit:

https://github.com/CyanogenMod/android_hardware_qcom_gps/commit/b1b77efb5c5e20b13a076489e7bb3f9258402b8e

Change-Id: I23d2aa09ae08afbcf7f98b89ade91eae137b29f6