bluez4: enable hard-wired bluetooth adapter on ttyO1

Gumstix COMs that have the Wi2Wi module provide bluetooth support through an
HCI/UART interface directly connected to the CPU's ttyO1 serial port.  This
additional service enables that interface when bluetooth is enabled.

Signed-off-by: Peter A. Bigot <pab@pabigot.com>
Merge pull request #7 from pabigot/for-dylan/bt-ttyO1

bluez4: enable hard-wired bluetooth adapter on ttyO1