native cc re-used after 3-stage now

[Robert Lipe]

David Edelsohn>         Ae you using GNU Make?  This looks like the sort
David Edelsohn> of problems that people encounter when they try to build
David Edelsohn> GCC using the native AIX Make.

Good thought.

On all systems where this fails, it's GNU make, though the precise
version does vary somewhat.  In all cases, it's the same GNU make that
successfully bootstrapped GCC prior to last week.

RJL