Isr.java: Fix ISR example to use pin 6 and sleep properly

Signed-off-by: Petre Eftime <petre.p.eftime@intel.com>
Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

examples/java/AioA0.java

@@ -30,6 +30,17 @@ import mraa.Aio;
 
 public class AioA0 {
 
+    static {
+        try {
+            System.loadLibrary("mraajava");
+        } catch (UnsatisfiedLinkError e) {
+            System.err.println(
+                "Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" +
+                    e);
+            System.exit(1);
+        }
+    }
+
     public static void main(String[] args) {
         Aio a0 = new Aio(0);
 
@@ -42,4 +53,4 @@ public class AioA0 {
 
     }
 }
-//! [Interesting]
+//! [Interesting]