Make "make" do a bootstrap if needed.

Make "make" do a bootstrap if needed.
* src/Makefile.in (emacs${EXEEXT}): Link the new emacs to bootstrap-emacs.
(bootstrapclean): Remove.
(.el.elc): New rule.
(PRECOMP): New var.
(../lisp/subdirs.el): Remove.
(bootstrap-emacs${EXEEXT}): Remove subdirs.el and charpro.el dependency.
(witness-emacs): New target.
(mostlyclean): Remove witness-emacs as well.
(../lisp/loaddefs.el, ${lisp} ${SOME_MACHINE_LISP}):
Add witness-emacs dependency.
* lisp/loadup.el: Don't add emacs-<VERS> name when bootstrapping.
* lisp/Makefile.in (emacs-deps): Remove.
($(lisp)/cus-load.el, $(lisp)/finder-inf.el): Re-add.
(all): Use them.
(autogen-clean): Remove.
* Makefile.in (maybe_bootstrap, src/bootstrap-emacs${EXEEXT})
(bootstrap-build): Remove.
(top_bootclean): New var.
(top_distclean, bootstrap-clean): Use it.
(bootstrap): Don't recheck config.  Make normally.