Minor error in docs

[Jeffrey A Law]

  In message < 199803200408.UAA21612@cygnus.com >you write:
  > In (gcc.info)HPPA Options, the -mschedule option says '7100' is for 7N5
  > machines and then '7100' is for 7N2 machines.  The next paragraph implies 7N2
  > should be 7100LC.  Here's a patch to invoke.texi to change this (if I got it
  > correct :-)
Correct 7x2 are 7100LC machines.  Thanks for the fix.

Jeff