ocamldoc/Makefile: manpages don't need generators anymore, odoc_man is builtin
ocamldoc/Makefile: manpages don't need generators anymore, odoc_man is builtin

gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml,gerdstolpmann/ocaml