configury: use bootstrap ChangeLog management feature.

configury: use bootstrap ChangeLog management feature.

* gl/build-aux/bootstrap.in (func_autoreconf): Accept an optional
directory argument to pass to $AUTORECONF.
Update doc-comment.
* bootstrap.conf (func_reconfigure): Remove. Don't completely
overwrite bootstrap's func_reconfigure, shadowing auto-ChangeLog
management.
(func_autopoint, func_libtoolize): Overwrite these un-needed
calls instead.
(libtool_autoreconf_libltdl): New hook function to run second
autoreconf in libltdl directory.
(libtool_force_changelog): Remove.  This is all handled by
bootstrap's func_reconfigure again.
* bootstrap: Regenerate.

Signed-off-by: Gary V. Vaughan <gary@gnu.org>