Support for attributes on class type fields.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/extension_points@13494 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Support dot-separated attributes for extensions and attributes.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/extension_points@13495 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Renaming pcstr_pat -> pcstr_self, cstr_pat -> cstr_self.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/extension_points@13496 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02