Change license headers

Change-Id: I98b18f24a20dcd8dc75e828e47fb0ab88179a5be
Reviewed-on: https://asterix-gerrit.ics.uci.edu/386
Reviewed-by: Till Westmann <tillw@apache.org>
Tested-by: Jenkins <jenkins@fulliautomatix.ics.uci.edu>
diff --git a/algebricks/algebricks-examples/piglet-example/src/main/javacc/PigletParser.jj b/algebricks/algebricks-examples/piglet-example/src/main/javacc/PigletParser.jj
index ee6f912..bb8db50 100644
--- a/algebricks/algebricks-examples/piglet-example/src/main/javacc/PigletParser.jj
+++ b/algebricks/algebricks-examples/piglet-example/src/main/javacc/PigletParser.jj
@@ -1,16 +1,20 @@
 /*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
  */
 options {
     STATIC = false;