Introducing a new module (pure interface) to define the AST of the intel assembly language.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/abstract_intel_emit@15157 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02
Share the masm criterion.

git-svn-id: http://caml.inria.fr/svn/ocaml/branches/abstract_intel_emit@15158 f963ae5c-01c2-4b8c-9fe0-0dff7051ff02