Add x86 darwin java support

[Mike Stump]

On Nov 26, 2006, at 7:46 PM, Mike Stump wrote:
> This patch adds x86 darwin libjava support on mainline.

I've checked in the boehm-gc changes:

2006-12-08  Mike Stump  <mrs@apple.com>

         * configure.ac: Fix x86 darwin builds.
         * darwin_stop_world.c: Likewise.
         * include/private/gcconfig.h: Likewise.
         * connfigure: Regenerate.

and I checked in the toplevel changes:

2006-12-08  Sandro Tolaini  <tolaini@libero.it>

         * configure.in: Add x86 darwin support for libjava.
         * configure: Regenerate.

into mainline and 4.2.  In addition I checked in the libjava changes  
to 4.2.

I was going to wait until end-to-end ack on the boehm changes, but  
he's kinda snowed under right now...

Tested on i386-apple-darwin9 and i386-apple-darwin8:

   http://gcc.gnu.org/ml/gcc-testresults/2006-12/msg00256.html
   http://gcc.gnu.org/ml/gcc-testresults/2006-12/msg00291.html

Geoff was a little concerned about build failures, but building and  
testing should be enough to ensure that it builds.  If anyone spots  
any (you don't build i386 on darwin3 do you?), I'd be happy to  
resolve them pronto, just let me know.