libtoolize: rewritten over funclib.sh instead of general.m4sh.
* Makefile.am (libtoolize_m4sh): Remove.
(EXTRA_DIST): Delete libtoolize_m4sh.
(libtoolize_in): Remove rule.
(libtoolize): Apply bootstrap_edit to libtoolize.in too.
* configure.ac (AC_CONFIG_SRCDIR): Refer to libtoolize.in.
* libtoolize.m4sh: Remove.
* libtoolize.in: Rewrite as a client of options-parser and the
new funclib.sh, avoiding the m4sh expansion step.
* tests/libtoolize.at, tests/old-ltdl-iface.at (experr): adjust
to match funclib.sh error output.
Signed-off-by: Gary V. Vaughan <gary@gnu.org>