license header consistency: Remove redundant "all rights reserved" statement

that is rendered meaningless by subsequent grant of rights through the LGPL.

Originally committed as revision 9606 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/alac.c

 /*
  * ALAC (Apple Lossless Audio Codec) decoder
  * Copyright (c) 2005 David Hammerton
- * All rights reserved.
  *
  * This file is part of FFmpeg.
  *

libavcodec/armv4l/simple_idct_arm.S

 /*
  * simple_idct_arm.S
  * Copyright (C) 2002 Frederic 'dilb' Boulay.
- * All Rights Reserved.
  *
  * Author: Frederic Boulay <dilb@handhelds.org>
  *