Use interrupt() in our interrupt exceptions (#24)

wpilibj/src/sim/java/edu/wpi/first/wpilibj/DriverStation.java

@@ -149,6 +149,7 @@ public class DriverStation implements RobotState.Interface {
       try {
         m_dataSem.wait(timeout);
       } catch (InterruptedException ex) {
+        Thread.currentThread().interrupt();
       }
     }
   }