g77 doc fix and x86 invoke.texi suggestion

[Jeffrey A Law]

  In message < rzqwvy3u25t.fsf@djlvig.dl.ac.uk >you write:
  > I thought I'd fixed the GCC 2.7 fossil in g77.texi, but apparently
  > not.
  > 
  > Related, I think the invoke.texi x86 submodel options section could
  > use clarification along the lines of the second patch.  Also it should
  > be explicit what is best for Pentium II as opposed to Pentium.  Is
  > this just -mcpu=pentium?
Sounds reasonable.  PII and PIII are closest to a PPro/i686.  Feel free
to add appropriate text for them.

This is fine for the mainline as well as the gcc-2.95 branch.


jeff