I needed this to make it appear to be able to talk to hci0

My bluetooth widgets arrived!

(WRTs are still in the post)
I don't mind adding this, even though I can't fit it on my device.

I'm pretty sure I don't have any bashisms in here, but maybe the busybox /bin/sh does more than dash? 

Either way, this is fine, dealing with non-bash compliant scripts is not worth the effort.