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

[Alfred M. Szmidt]

The following fixes #21819 (I was requested to send it to gcc-patches@
and java-patches by Andrew Pinski).

2005-08-09  Alfred M. Szmidt  <ams@gnu.org>

	        * configure.ac: Detect the GNU system.

--- libffi/configure.ac
+++ libffi/configure.ac
@@ -41,6 +41,7 @@
 
 TARGETDIR="unknown"
 case "$host" in
 i*86-*-linux*) TARGET=X86; TARGETDIR=x86;;
+i*86-*-gnu*) TARGET=X86; TARGETDIR=x86;;
 i*86-*-solaris*) TARGET=X86; TARGETDIR=x86;;
 i*86-*-beos*) TARGET=X86; TARGETDIR=x86;;