* tools/gitlog-to-changelog: New file, from gnulib.
* Makefile.am (EXTRA_DIST): Distribute it.
(dist-hook, gen_start, gen-ChangeLog): Generate the ChangeLog during
distdir.
Debian versions installed in build hosts during automatic builds.
* m4/libtool.m4: New file, from GNU Libtool 1.4.24.
* tools/ltmain.sh: New file, from GNU Libtool 1.4.24.
* HACKING: Installing Libtool is no longer required.