cmdutils: update copyright year to 2015.

(cherry picked from commit 3e160652)

Conflicts:

	cmdutils.c

cmdutils.c

@@ -68,7 +68,7 @@ struct SwsContext *sws_opts;
 AVDictionary *swr_opts;
 AVDictionary *format_opts, *codec_opts, *resample_opts;
 
-const int this_year = 2014;
+const int this_year = 2015;
 
 static FILE *report_file;