would force us to relink all libraries when staging.
Now that libraries do not hardcode dll paths, add a check that correct
-rpath-link options are added. When staging, we don't hardcode-dll-paths,
and libraries never hardcode dll paths, so if there's a long chain of
libraries, we should add -rpath-link, otherwise the linker won't find
the dynamic libraries and will complain.
[SVN r25756]