[parisc-linux] -pie is broken on hppa

[Kyle McMartin]

> The latest crash was:
> mx3210:/var/log# df
> Filesystem           1K-blocks      Used Available Use% Mounted on
> *** crash ***
> 

df uses statfs64, which was added to 2.6.21... I'm confused why we're
not catching it in syscall.S, I'll need to sit and think a bit.

--Kyle