Fix autoreconf failure with gettext 1.0:

configure.ac:37: error: possibly undefined macro: AM_GNU_GETTEXT_VERSION
--- autogen.sh.orig	2021-09-04 07:18:21.000000000 -0500
+++ autogen.sh	2026-03-20 23:01:55.000000000 -0500
@@ -2,7 +2,8 @@
 test -n "$srcdir" || srcdir=`dirname "$0"`
 test -n "$srcdir" || srcdir=.
 (
+  prefix=$(dirname $(dirname $(command -v autopoint)))
   cd "$srcdir" &&
-  AUTOPOINT='intltoolize --automake --copy' autoreconf --force --install --verbose
+  AUTOPOINT='intltoolize --automake --copy' autoreconf --force --install --verbose -I"$prefix/share/gettext/m4"
 ) || exit
 test -n "$NOCONFIGURE" || "$srcdir/configure" "$@"