[doc] Flip the text concerning Autoconf 2.13/2.59

[Kelley Cook <kcook34 at ford dot com>]

I flip-flopped the autoconf version documentation, so that as each 
directory is converted to autoconf 2.5x, the documented exception list 
will get shorter.

OK for mainline?

KC
2004-03-10  Kelley Cook  <kcook@gcc.gnu.org>

	* doc/install.texi: Bump autoconf version to 2.59.  Document
	directories still requiring 2.13.

diff -cpd /CVS/gcc/gcc/doc/install.texi ./install.texi
*** /CVS/gcc/gcc/doc/install.texi	Mon Mar  8 10:32:15 2004
--- ./install.texi	Wed Mar 10 14:06:22 2004
*************** systems' @command{tar} programs will als
*** 287,300 ****
  @heading Tools/packages necessary for modifying GCC
  @table @asis
  
! @item autoconf versions 2.13 and 2.57
  @itemx GNU m4 version 1.4 (or later)
  
! Necessary when modifying @file{configure.in}, @file{aclocal.m4}, etc.@:
  to regenerate @file{configure} and @file{config.in} files.  Most
! directories require autoconf 2.13 (exactly), but @file{libiberty},
! @file{fastjar}, @file{libstdc++-v3}, @file{libjava/libltdl}, @file{boehm-gc},
! @file{intl}, @file{libada}, and @file{gcc} require autoconf 2.57 (exactly).
  
  @item automake versions 1.4-gcj and 1.7.9
  
--- 287,300 ----
  @heading Tools/packages necessary for modifying GCC
  @table @asis
  
! @item autoconf versions 2.13 and 2.59
  @itemx GNU m4 version 1.4 (or later)
  
! Necessary when modifying @file{configure.ac}, @file{aclocal.m4}, etc.@:
  to regenerate @file{configure} and @file{config.in} files.  Most
! directories require autoconf 2.59 (exactly), but the toplevel, @file{libf2c},
! @file{libffi}, @file{libobjc}, @file{zlib}, and @file{libjava} (except for 
! @file{libjava/libltdl}) still require autoconf 2.13 (exactly).
  
  @item automake versions 1.4-gcj and 1.7.9