cmdutils: update copyright year to 2016

CC: libav-stable@libav.org
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

cmdutils.c

@@ -58,7 +58,7 @@
 struct SwsContext *sws_opts;
 AVDictionary *format_opts, *codec_opts, *resample_opts;
 
-static const int this_year = 2015;
+static const int this_year = 2016;
 
 void init_opts(void)
 {