[Bug libffi/21819] i*86-*-gnu* not enabled in configure.ac

[Tom Tromey]

>>>>> "Alfred" == Alfred M\ Szmidt <Alfred> writes:

Alfred> The following fixes #21819 (I was requested to send it to gcc-patches@
Alfred> and java-patches by Andrew Pinski).
Alfred> 2005-08-09  Alfred M. Szmidt  <ams@gnu.org>
Alfred> 	        * configure.ac: Detect the GNU system.

This is fine.  I'm checking it in to cvs head and also the 4.0 branch.

Tom