PR modula2/117703: libgm2 soname bumps for GCC 15

Bump libgm2 version ready for the gcc-15 release.

libgm2/ChangeLog:

	PR modula2/117703
	* configure: Regenerate.
	* configure.ac (libtool_VERSION): Bump to 20:0:0.

Signed-off-by: Gaius Mulley <[email protected]>

Author: Gaius Mulley

libgm2/configure

@@ -2675,7 +2675,7 @@ ac_compiler_gnu=$ac_cv_c_compiler_gnu
 ac_config_headers="$ac_config_headers config.h"
 
 
-libtool_VERSION=19:0:0
+libtool_VERSION=20:0:0
 
 
 # Default to --enable-multilib

libgm2/configure.ac

@@ -1,5 +1,5 @@
 # Configure script for libgm2.
-# Copyright (C) 2013-2023 Free Software Foundation, Inc.
+# Copyright (C) 2013-2024 Free Software Foundation, Inc.
 
 # This file is part of GCC.
 
@@ -27,7 +27,7 @@ AC_CONFIG_SRCDIR(Makefile.am)
 # AC_CONFIG_MACRO_DIR([config])
 AC_CONFIG_HEADER(config.h)
 
-libtool_VERSION=19:0:0
+libtool_VERSION=20:0:0
 AC_SUBST(libtool_VERSION)
 
 AM_ENABLE_MULTILIB(, ..)