make check failure on x86-64 with abilist

[Roland McGrath]

> I see - and I build with a different configure line.  So, this error
> will always appear if something different from --prefix=/usr is used
> :-(.  

Yes.

> Can we avoid this somehow?

We never should have exported a char array like that in the first place. :-(
I wonder why that is a public symbol at all.  _nl_default_dirname looks
internal to me.