Updating top-level autoconf to 2.59

[Daniel Jacobowitz]

On Fri, Dec 08, 2006 at 02:11:52PM -0800, Doug Evans wrote:
> fwiw, I wouldn't mind an explanation for why
> +m4_pattern_allow([AS_FOR_TARGET])dnl
> is necessary.  I've ran into that too.  Blech.

AS_* is normally used by autoconf.  If autoconf sees it in the
generated file, it assumes you've misspelled some autoconf directive.

-- 
Daniel Jacobowitz
CodeSourcery