[PATCH, i386]: Correct HAVE_AS_IX86_REP_LOCK_PREFIX configure test for Darwin

[IainS]

On 9 Jul 2010, at 19:52, IainS wrote:

>> Patch was bootstrapped and regression tested on x86_64-pc-linux-gnu.
>> The patch was also tested on i686-apple-darwin{8,9} and
>> x86_64-apple-darwin10 by Iain.
>
> Hmm. somehow this test is now being applied to powerpc-apple-darwin  
> and breaks bootstrap for it (of course).
> I guess something got moved in the regeneration...

mea cupla,  I missed an update text conflict...
... sorry for the noise.
Iain