[PATCH][Revision4]: Don't XFAIL 21674.cc on darwin

[Mike Stump]

On Dec 18, 2008, at 9:43 AM, Janis Johnson wrote:
>> +// { dg-do run { xfail !*-*-darwin* } }
>
> I'm very surprised that this is accepted; it is, but unfortunately
> it doesn't have any effect, according to my tests.

And the way I test these sorts of things when I do them on one system  
is to change the spelling from darwin to linux and back and see if  
each works as I expect.  If it does, it gives me more confidence the  
incantation will work in the end.  I do like copying existing  
incantations that are known to be good, and it's a good idea to beat  
up on people that use non-sensical incantations when they are  
discovered.