pulse: build hal-detect. Closes #3297

pulse: build hal-detect. Closes #3297
Currently OE's pulseaudio recipe does not build pulseaudio's hal-detect module.
The attached patch adds hal to the dependencies and activates the configure
switch.
For what hal-detect is neccessary?
If you plug in a USB headset to your device a pulseaudio server with the
hal-detect module will automatically create a sink (and source) for the
headset. In theory this should also work for bluetooth devices but I don't have
the hardware to test that.