libio patches for glibc 2.1

[H.J. Lu]

> 
> >>>>> Jeffrey A Law <law@cygnus.com> writes:
> 
> > We need patches for:
> 
> >     * A fix for the sigset_t problem.  I've got no opinion on what
> >     the best fix is -- I'm depending on y'all to make that technical
> >     decision.    
> 
> Fixed.
> 

I think that fix breaks glibc 2.1 and glibc 2.0.7.

-- 
H.J. Lu (hjl@gnu.org)