assemble_external on .class files

[Jeffrey A Law]

  In message < 4.1.19990523114346.00c77100@garfield.dis.com >you write:
  > >Thanks ... brute force method it is! Just when I was starting to see the
  > >_trees_ through the forest. :-)
  > 
  > On further thought ... what will this do to other platforms requiring
  > assemble_external? While this fix may work for PA-RISC, might it cause
  > other problems elsewhere?
I do not believe so -- first most systems don't require importing symbols.
Second, we're already importing symbols which are never referenced on those
few systems that need imports.

jeff