Patch to i386/linux.h

[Jeffrey A Law]

  In message < 199807120831.BAA05274@yorick.cygnus.com >you write:
  > A straightforward patch to make the common x86 defines work like
  > CPP_PREDEFINES.
  > 
  > Sun Jul 12 01:27:05 1998  Jason Merrill  <jason@yorick.cygnus.com>
  > 
  > 	* i386/linux.h (CPP_SPEC): Handle -undef and -ansi.
Actually, I think Jim's patch is better, both in the short and long
term.  It significantly cleans up this braindamage.

jeff