[Omake] scanning of .mly files

[Benjamin Pierce]

Now that others on the Harmony team are trying out my OMakefiles,  
we're seeing some strange behavior from OMake where dependencies are  
being calculated correctly on some people's machines and not on others.

Should .ml files be built automatically from .mly and .mll files  
before other ocaml files are scanned, or is this something that needs  
to be set up manually by calling OCamlGeneratedFiles?

My reading of OCaml.om is that this will *not* happen automatically  
-- arguably it should.  But in any case, it seems strange that the  
resulting behavior should differ from one machine to another.  Is  
there some way we can cause OMake to dump enough information to see  
what the difference might be?

     - Benjamin