Update copyright/authors headers
diff --git a/linux/unwind.c b/linux/unwind.c
index 51d1819..870db80 100644
--- a/linux/unwind.c
+++ b/linux/unwind.c
@@ -5,7 +5,7 @@
  *
  * Author: Robert Swiecki <[email protected]>
  *
- * Copyright 2010-2015 by Google Inc. All Rights Reserved.
+ * Copyright 2010-2018 by Google Inc. All Rights Reserved.
  *
  * 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