* make-tarball.txt: Suggest 'autoreconf -I m4 --force'

rather than doing rm and autoconf by hand.  See
<http://lists.gnu.org/archive/html/emacs-devel/2011-01/msg00673.html>.

admin/ChangeLog

+2011-01-19  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* make-tarball.txt: Suggest 'autoreconf -I m4 --force'
+	rather than doing rm and autoconf by hand.  See
+	<http://lists.gnu.org/archive/html/emacs-devel/2011-01/msg00673.html>.
+
 2011-01-17  Paul Eggert  <eggert@cs.ucla.edu>
 
 	* notes/bzr (Installing changes from gnulib): New section.

admin/make-tarball.txt

@@ -28,7 +28,7 @@ For each step, check for possible errors.
     refer to a newer release of Emacs.  (This is probably needed only
     when preparing a major Emacs release, or branching for it.)
 
-5.   rm configure src/config.in; autoconf; autoheader
+5.   autoreconf -I m4 --force
      make bootstrap
 
 6.  Commit configure, src/config.in, etc/AUTHORS, all the files changed
@@ -107,4 +107,3 @@ For each step, check for possible errors.
 13. For a pretest, announce it on emacs-devel and BCC the pretesters.
     For a release, announce it on info-gnu@gnu.org,
     info-gnu-emacs@gnu.org, and emacs-devel.
-