Fix for ocamlbuild changes/bug in latest OCaml
Fix for ocamlbuild changes/bug in latest OCaml

* Add OCAMLBUILDFLAGS variable to Makefile and use for all invocations
  other than -clean
* Make OCAMLBUILDFLAGS default to -no-links to work around OCaml
  3.12.1 wonkiness

bennn/batteries-included