Directly install libraries into a port-specific location instead of
moving them there after the original installation. This is simpler
and also avoids the problem where the port would overwrite/remove an
existing copy of libiberty.a, which boils down to a true conflict.
No longer put target specific files and include files at the very
end of pkg-plist since that broke the /sbin/ldconfig invocations the
ports machinery added there (before we'd get a chance).
Reported by: dinoex