add bootstrap script as alternative to autogen.sh

bootstrap

@@ -0,0 +1,37 @@
+#!/bin/sh
+#
+# autotools bootstrap script for py2gtk2
+#
+# This file is part of py2gtk2
+#
+# Copyright (C) 2023 Nedko Arnaudov <nedko@nedk.org>
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+
+if test x$1 = xclean
+then
+  GENERATED="aclocal.m4 autom4te.cache config.h.in configure m4 Makefile.in"
+  set -x
+  if test -f Makefile; then make distclean; fi
+  rm -rf ${GENERATED}
+else
+  set -x
+  mkdir -p m4
+  aclocal -I m4
+  libtoolize --copy --force
+  autoheader
+  automake --foreign --add-missing --copy
+  autoconf
+fi