Do not add absolute paths for information added to
the local environment in Env.components_of_module_make.
Fixes the bug reported by Mark Shinwell on caml-devel,
on 2014-04-23. This bug was related to module aliases.
git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@14674 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02