before branching 4.01

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13774 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
update version number after branching 4.01

git-svn-id: http://caml.inria.fr/svn/ocaml/trunk@13775 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02