One more copyright fix.

com.oracle.truffle.r.test/src/com/oracle/truffle/r/test/S4/TestS4.java

 /*
- * Copyright (c) 2015, 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it