[PATCH] move some stuff from toplevel config to libiberty/config

[DJ Delorie]

> The situation is that the 'config/mh-*pic' fragments are now *only*
> used by libiberty (not by anything else in gcc or src).
> Accordingly, they belong in libiberty/config.  So they should be
> moved there.

I don't agree with this logic.  A global resource used by only one
subdirectory is still a global resource.

If everyone else has changed to no longer use these files, then
perhaps the correct solution is to change libiberty also?