[PATCH] Convert BFD to autoconf 2.50

[Nick Clifton]

Hi Nathanael,

> OK to commit?
> (Please reply to list as my email is in a state of flux right now.)
> 
> 	* acinclude.m4: Require AC_CANONICAL_TARGET, not AC_CANONICAL_SYSTEM.
> 	* aclocal.m4: Rebuild.
> 	* configure.in: Autoupdate with autoupdate 2.59.
> 	* config.in: Regenerate with autoheader 2.59.
> 	* configure: Regnerate with autoconf 2.59.

Approved - please apply

Cheers
   Nick