Fix copyrights

From-SVN: r32186

gcc/config/fp-bit.c

 /* This is a software floating point library which can be used instead of
    the floating point routines in libgcc1.c for targets without hardware
    floating point. 
-   Copyright (C) 1994-1998, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1994, 1995, 1996, 1997, 1998,
+   2000 Free Software Foundation, Inc.
 
 This file is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the

gcc/config/nextstep.c

 /* Functions for generic NeXT as target machine for GNU C compiler.
-   Copyright (C) 1989, 90-93, 96, 97, 98, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1996, 1997, 1998,
+   2000 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 

gcc/config/nextstep.h

 /* Operating system specific defines to be used when targeting GCC
    for NeXTSTEP.
-   Copyright (C) 1989, 90-93, 1996, 1997, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1989, 1990, 1991, 1992, 1993, 1996, 1997,
+   1999 Free Software Foundation, Inc.
 
 This file is part of GNU CC.
 

gcc/config/svr4.h

 /* Operating system specific defines to be used when targeting GCC for some
    generic System V Release 4 system.
-   Copyright (C) 1991, 94-99, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1991, 1994, 1995, 1996, 1997, 1998, 1999,
+   2000 Free Software Foundation, Inc.
    Contributed by Ron Guilmette (rfg@monkeys.com).
 
 This file is part of GNU CC.