1.0.30.4: cfasl support

1.0.30.4: cfasl support

        Experimental support for compiling any toplevel compile-time
        effects to a separate cfasl file, in addition to evaluating
        them.

        * Open a second fasl output stream if :EMIT-CFASL is passed to
          COMPILE-FILE. In the places where we'd normally evaluate the body
          of a EVAL-WHEN :COMPILE-TOPLEVEL do both the evaluation and do a
          normal compilation of the form, with the output going to the second
          fasl stream.
        * Fix a couple of places where a %compiler-defun would assume it'd
          never be called outside the compiler (now it can be called during
          cfasl loading).
        * Remove the timestamps from the human-readable fasl header. They're
          not really useful for anything, and make the cfasls less deterministic
          and thus less useful.