[cygnus.bug-gcc] `-Q' switch to GCC is not documented; fix included

[Jeffrey A Law]

  In message < sy90u38q8m.fsf@tiktok.cygnus.com >you write:
  > I tend to agree with Nate's posting to bug-gcc, we probably should document
  > this in egcs.  I mean the switch has been valid since at least gcc 2 if not
  > gcc 1.35 and beyond.
Done.
jeff