Re: [Libguestfs] [ for 1.38] ocaml: When creating compat Bytes module, create bytes.mli file.

On distros with OCaml < 4.02 we need to create a compatibility Bytes module. However we didn't create the interface file (bytes.mli) which would mean that dependencies wouldn't be created correctly for parallel builds. This commit uses ‘ocaml -i’ to create an interface file which exports everything. ---