base-station: Reply to GetSalt requests.

base-station/software/src/radio.rs

     }
 
     fn send_packet(&mut self, device_id: u8, packet: Packet) -> Result<(), Error> {
-        /*let salt = self.rng.gen::<u64>();
+        let salt = self.rng.gen::<u64>();
         let mut tx = self
             .rx
             .take()
                 .map_err(Error::Radio)?
                 .rx()
                 .map_err(|(_, e)| Error::Radio(e))?,
-        );*/
+        );
         Ok(())
     }
 }