gpsd: add PACKAGECONFIG for bluez

* it's autodetected from sysroot

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
foxtrotgps: add bluez4 dependency

* configure doesn't allow to disable it and bluez is quite common
  on devices where foxtrotgps would be used

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
gnome-vfs: add PACKAGECONFIG for avahi

* it's autodetected from sysroot

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>