Add new example to illustrate taint propagation with def-use dataflow

sample-utility-1.js

@@ -0,0 +1,17 @@
+var SampleUtility = function() {
+    var value = this.getParameter('value');
+
+    var ua = new GR('users');
+    ua.query();
+    
+    if(!ua.hasNext()){
+	ua.initialize();
+	ua.setValue('status',value);
+	ua.insert();
+    }
+    else {
+	ua.next();
+	ua.setValue('status',value);
+	ua.update();
+    }
+}