libtool: Revert "libtool: bump to 2.4.6"

This breaks the package builds using the SDK.
The targets all build fine, but the package builder fails on many
packages. The package builder uses the OpenWrt SDK.

This reverts commit c377d874be.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>

tools/libtool/patches/130-trailingslash.patch

@@ -1,38 +0,0 @@
-From 1b45c3c0d6682be7f4876b620780ee246a5acbaa Mon Sep 17 00:00:00 2001
-From: Eneas U de Queiroz <cotequeiroz@gmail.com>
-Date: Tue, 20 Jul 2021 16:56:16 -0300
-Subject: openwrt: remove trailing slash in install destdir
-
-A command like /bin/sh ../../i586-poky-linux-libtool   --mode=install /usr/bin/install -c   gck-roots-store-standalone.la '/media/data1/builds/poky1/tmp/work/core2-poky-linux/gnome-keyring-2.26.1-r1/image/usr/lib/gnome-keyring/standalone/' fails (e.g. gnome-keyring or pulseaudio)
-
-This is because libdir has a trailing slash which breaks the comparision.
-
-RP 2/1/10
-
-Merged a patch received from Gary Thomas <gary@mlbassoc.com>
-
-Date: 2010/07/12
-Nitin A Kamble <nitin.a.kamble@intel.com>
-
-(adjusted to v2.4.6)
-Signed-off-by: Eneas U de Queiroz <cotequeiroz@gmail.com>
-
---- a/build-aux/ltmain.in
-+++ b/build-aux/ltmain.in
-@@ -2363,8 +2363,15 @@ func_mode_install ()
- 	func_append dir "$objdir"
- 
- 	if test -n "$relink_command"; then
-+      # Strip any trailing slash from the destination.
-+      func_stripname '' '/' "$libdir"
-+      destlibdir=$func_stripname_result
-+
-+      func_stripname '' '/' "$destdir"
-+      s_destdir=$func_stripname_result
-+
- 	  # Determine the prefix the user has applied to our future dir.
--	  inst_prefix_dir=`$ECHO "$destdir" | $SED -e "s%$libdir\$%%"`
-+	  inst_prefix_dir=`$ECHO "X$s_destdir" | $Xsed -e "s%$destlibdir\$%%"`
- 
- 	  # Don't allow the user to place us outside of our expected
- 	  # location b/c this prevents finding dependent libraries that