Log Message:
config.status is called to rebuild Makefiles if config.status is changed
and we now change it.  Unfortunately at the toplevel "Makefile" is passed
as the argument but config.status expects "./Makefile" so fails.

Patch the Makefile to not try and update Makefile in this case, as if it
worked it would make no functional change to the Makefile anyway so don't
bother.