add Task.setTaskName() to list of hidden set methods

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@447980 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/IntrospectionHelper.java

@@ -307,6 +307,10 @@ public final class IntrospectionHelper implements BuildListener {
             return true;
         }
 
+        if ("setTaskName".equals(name)
+             && java.lang.String.class.equals(type)) {
+            return true;
+        }
         return false;
     }