[patch, darwin] repost of a patch to make "-static-libgfortan" work.

[Paolo Bonzini]

I haven't looked at the patch, but...

>     gcc/config/x-darwin:  add a flag signalling that this host needs
> distinct static library names.

This is a target-specific feature, not a host-specific feature.  While
Darwin is almost always bootstrapped, you can still see the difference:
if I build a darwin-to-linux cross (build=host=darwin, target=linux) the
linker *will* have working -Bstatic/-Bdynamic.

You can put it in config/darwin.h.

Paolo