Update copyright year in NOTICE

git-svn-id: https://svn.apache.org/repos/asf/pig/trunk@1578958 13f79535-47bb-0310-9956-ffa450edef68

Author: Cheolsoo Park

NOTICE.txt

@@ -1,5 +1,5 @@
 Apache Pig
-Copyright 2008 The Apache Software Foundation
+Copyright 2008-2014 The Apache Software Foundation
 
 This product includes software developed by The Apache Software
 Foundation (http://www.apache.org/).