changing default 'ld' in /opt/local/bin/ for 10.6 to ld-latest

[Gagan Sidhu via macports-dev]

is there any way to do this in the portfile?

-fuse-ld=ld-latest ain't enough for clang.

didn't ken say that we should be moving away from ld127 on 10.6 anyways? what's 
the harm in upping ld's symlink to ld-latest for 10.6?

Thanks,
Gagan