[MLton] MLton on intel mac

[Matthew Fluet]

> Great news, I got it working.  MLton compiled with itself on an intel mac was 
> able to compile itself again.

Awesome!  Please send a patch as soon as possible.  We'd like to get it 
into the repository for others to try.

> The mlnlffi library doesn't build (lacks memory.x86-darwin.mlb).  I'll look 
> at it but perhaps someone more familiar with the infrastructure should take a 
> look.

You ought to be able to copy memory.x86-linux.mlb.

> Also, some of the tools make-pdf-guide expects aren't there by default.
>
> Other than this, there seem to be no issues from what I can tell.
>
> I'm busy at the moment, but I'll try to get an installable version made 
> sometime soon.