libavutil: fix author attribution

Libav.org has removed this while moving the code around

For reference, the code was originally added in:
commit 9aeeeb63
Author: Fabrice Bellard <fabrice@bellard.org>
Date:   Wed Dec 20 00:02:47 2000 +0000

    Initial revision

    Originally committed as revision 2 to svn://svn.ffmpeg.org/ffmpeg/trunk
--
The function name originates from:
commit 94988531
Author: Fabrice Bellard <fabrice@bellard.org>
Date:   Thu Jul 25 16:01:46 2002 +0000

    more consistent naming

    Originally committed as revision 802 to svn://svn.ffmpeg.org/ffmpeg/trunkSigned-off-by: Michael Niedermayer <michaelni@gmx.at>

libavutil/time.c

 /*
- * This file is part of Libav.
+ * Copyright (c) 2000-2003 Fabrice Bellard
  *
- * Libav is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

libavutil/time.h

 /*
- * This file is part of Libav.
+ * Copyright (c) 2000-2003 Fabrice Bellard
  *
- * Libav is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 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
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
- * License along with Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */