Bluetooth: set BT_WAKE polarity to active low

Solves instability. Bluetooth can now turn on, off and pair
with devices correctly. Other Bluetooth functions not yet tested.

Change-Id: I05ee666cc2d37337ef71beee9a1e0b0f7ceaedee
get_macaddrs: fix permissions for Bluetooth MAC

Change-Id: I6fcb5f232aa55051b7a50679d1ab7e9809f767e0