Fix header in TestBuiltin_extract_dataframe

com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/builtins/TestBuiltin_extract_dataframe.java

 /*
- * This material is distributed under the GNU General Public License
- * Version 2. You may review the terms of this license at
- * http://www.gnu.org/licenses/gpl-2.0.html
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
- * Copyright (c) 2014, Purdue University
- * Copyright (c) 2014, 2016, Oracle and/or its affiliates
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
  *
- * All rights reserved.
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
  */
 package com.oracle.truffle.r.test.builtins;