batman-adv: update copyright years for 2016

Signed-off-by: Sven Eckelmann <sven@narfation.org>
Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch>
Signed-off-by: Antonio Quartulli <a@unstable.cc>

net/batman-adv/main.h

@@ -1,4 +1,4 @@
-/* Copyright (C) 2007-2015 B.A.T.M.A.N. contributors:
+/* Copyright (C) 2007-2016  B.A.T.M.A.N. contributors:
  *
  * Marek Lindner, Simon Wunderlich
  *