runlisp: A number of things.

  * Make sure *command-line-strings* is actually bound to a value.  Life
    is too unpleasant if it isn't.

  * CMU needs the verbosity parameters set later than the other Lisps,
    so move the code into a function and call it in the appropriate
    places.

  * Use CMU's *command-line-strings* symbol; otherwise we get doomy
    symbol conflicts.