p500: Copy bluetooth vendor config

The bt_vendor.conf file is needed by every device,altough it's built only for certain devices (crespo,grouper,maguro etc). Using a prebuilt one is needed.

Change-Id: Id9acb4ec23111fa367348711c24c38c5e6203d54
Fix common include priority for p509

PRODUCT_COPY_FILES: First definition wins if the file name is the same. Most specific first.
DEVICE_PACKAGE_OVERLAYS: Last definition wins. Most specific last.
CONFIG := xxx: Last definition wins. Most specific last.

TESTED ON: configs/wpa_supplicant.conf

Change-Id: I939ac9ff90a7ad607ea3836ca669c553ed9cdfab
p509: Use tiny config

Change-Id: Icb4b30528b2514747e86b115795557ea98b8052c