Update copyright year in a couple of places

Change-Id: Ic418801ac1ac4f278f2fcd7dd9fbadcbc0136fb4
diff --git a/util.py b/util.py
index 9474211..1f6ee50 100644
--- a/util.py
+++ b/util.py
@@ -1,4 +1,4 @@
-#  Copyright 2014-2016 Linaro Limited
+#  Copyright 2014-2018 Linaro Limited
 #
 #  This program is free software; you can redistribute it and/or modify
 #  it under the terms of the GNU General Public License as published by