* gnulib: Update to the latest git version.
* gl-mod/bootstrap: Likewise.
* bootstrap: Regenerate.
* gl/top/README-release.diff: Update the patch for the latest
changes in gnulib's README-release.
To avoid clashes with gnulib argz module in ltdl client projects,
move ours into its own namespace.
* libltdl/argz_.h, libltdl/argz.c, m4/argz.m4: Move from here...
* libltdl/libltdl/lt__argz_.h, libltdl/lt__argz.c, m4/ltargz.m4:
...to here.
* Makefile.am, libltdl/libltdl/lt__glibc.h, libltdl/ltdl.mk,
libtoolize.in, m4/ltdl.m4: Adjust accordingly.
* tests/libtoolize.at, tests/ltdl-api.at, tests/nonrecursive.at,
tests/old-ltdl-iface.at: Adjust for different libtoolize output.
* libltdl/.gitignore: Adjust accordingly.
* NEWS: Update.
Reported by Pavel Raiskup
Signed-off-by: Gary V. Vaughan <gary@gnu.org>