batman-adv: update copyright years for 2017

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
diff --git a/net/batman-adv/main.h b/net/batman-adv/main.h
index 8683542..57a8103 100644
--- a/net/batman-adv/main.h
+++ b/net/batman-adv/main.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
+/* Copyright (C) 2007-2017  B.A.T.M.A.N. contributors:
  *
  * Marek Lindner, Simon Wunderlich
  *