Linting dep-ann: Added @Deprecated annotations in BOB and i2p_sdk

apps/BOB/src/net/i2p/BOB/BOB.java

@@ -143,6 +143,7 @@ public class BOB implements Runnable, ClientApp {
 	 * Stop BOB gracefully
 	 * @deprecated unused
 	 */
+	@Deprecated
 	public synchronized static void stop() {
 		if (_bob != null)
 			_bob.shutdown(null);

apps/BOB/src/net/i2p/BOB/UDPIOthread.java

@@ -36,6 +36,7 @@ import net.i2p.util.Log;
  * @author sponge
  * @deprecated incomplete, unused
  */
+@Deprecated
 public class UDPIOthread implements I2PSessionListener, Runnable {
 
 	private final NamedDB info;