last commit before tagging 4.02.0

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15152 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
increment version number after tagging 4.02.0

git-svn-id: http://caml.inria.fr/svn/ocaml/version/4.02@15155 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02