[RFC] pthread_once: Use unified variant instead of custom x86_64/i386

[Torvald Riegel]

On Mon, 2014-10-20 at 11:18 -0700, Roland McGrath wrote:
> > +    return __pthread_once_slow 23(once_control, init_routine);
> 
> All looks good except this stray "23".  Its presence suggests you didn't
> test the final version of the patch you posted, which you need to do before
> committing.

Oops, sorry.  Yes, I didn't test after the whitespace fixes (but
before).  I'll make a note to self...

Committed after testing on x86_64.