avfilter/x86/vf_hqdn3d_init: fix author attribution & project name

Reference: 7a1944b9Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/x86/vf_hqdn3d_init.c

 /*
- * This file is part of Libav.
+ * Copyright (c) 2012 Loren Merritt
  *
- * Libav is free software; you can redistribute it and/or modify
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
- * Libav is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License along
- * with Libav; if not, write to the Free Software Foundation, Inc.,
+ * with FFmpeg; if not, write to the Free Software Foundation, Inc.,
  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */