Set the version number in the texinfo manuals using configure.

Set the version number in the texinfo manuals using configure.

* doc/misc/Makefile.in (emacsdir): New variable.
($(infodir)/efaq): Pass -I $(emacsdir) to makeinfo.
* doc/misc/faq.texi (VER): Replace with EMACSVER from emacsver.texi.

* doc/lispref/Makefile.in (emacsdir): New variable.
(MAKEINFO): Add -I $emacsdir.
(dist): Copy emacsver.texi.
* doc/lispref/book-spine.texinfo, doc/lispref/elisp.texi:
* doc/lispref/vol2.texi, doc/lispref/vol1.texi:
Set EMACSVER by including emacsver.texi.

* doc/emacs/emacsver.texi.in: New file.
* doc/emacs/emacs.texi: Set EMACSVER by including emacsver.texi.
* doc/emacs/Makefile.in (distclean): Delete emacsver.texi.
(dist): Copy emacsver.texi.

* admin/admin.el (set-version): No need to act on doc/ files any more.

* configure.in (AC_OUTPUT): Add doc/emacs/emacsver.texi.
* make-dist: Include doc/emacs/*.texi.in.