fix bootstrap problem on i386-darwin

[Andrew Pinski]

On Mon, 2006-09-11 at 23:06 -0700, Geoffrey Keating wrote:
> If you just type './configure && make' on an x86 darwin machine, the
> bootstrap fails, with this error:
> 
> Bootstrapped & tested on i386-darwin9.  There were some new dejagnu test
> failures, and some failures that went away, but on balance it came
> to about the same.

I think you should do something like what is done for i386-solaris with
the following patch:
2006-07-05  H.J. Lu  <hongjiu.lu@intel.com>

        PR target/26146
        * config.gcc: Check with_cpu for i[34567]86--*-solaris2.1[0-9]

Thanks,
Andrew Pinski