Log Message:
Updated package to version 0.9.2. Changes include:

OCamlbuild 0.9.2 is a release to support OCaml 4.03. Martin Neuhäußer
contributed new flags for flambda-specific optimization options. We
also extend the scope of the flags -opaque and -for-pack, to align
with 4.03 best practices. Note that OCamlbuild should still work
correctly under older OCaml releases.

- 67: Add support for flambda's optimization parameters
  The flags are named according to the flambda options with two exceptions:
    optimization_rounds(int) for -rounds <int>
    optimize({2,3,classic}) for -O{2,3,classic}
  (Martin Neuhäußer)
- 70 (pratial): fix hygiene complains about the build directory under
  Windows
  (Andreas Hauptmann, Gabriel Scherer)
- 73: also pass predicates(foo) to ocamldep
  (Jérémie Dimino)
- extend the scope of the -opaque flag under 4.03
  (Gabriel Scherer)
- extend the scope of the -for-pack flag to ocamlc,
  as recommend by OCaml compiler maintainers in
  [5996](http://caml.inria.fr/mantis/view.php?id=5995#c13339)
  (Gabriel Scherer)