[MLton] starting builds

[Stephen Weeks]

> A log is attached. I had to kill world5.

Well, we now have lots of buggy examples that don't require self
compiles.  That's progress :-).

You can pick any one of them, the smaller the better, compile with
-keep g, and use gdb to find the line in the generated C code where
the bus error occurs.  I'm betting on an alignment issue.

You might also compile -debug true, which will link with a runtime
with asserts turned on.