bug#14155: libtool 2.4.2 bug: default " sys_lib_dlsearch_path_spec" missing paths where LIBDIR=lib64

[ar16]

I've

        libtool --version
                libtool (GNU libtool) 2.4.2
                Written by Gordon Matzigkeit <address@hidden>, 1996

                Copyright (C) 2011 Free Software Foundation, Inc.
                This is free software; see the source for copying
                conditions.  There is NO
                warranty; not even for MERCHANTABILITY or FITNESS FOR A
                PARTICULAR PURPOSE.

on

        lsb_release -a
                LSB Version:   
                
core-2.0-noarch:core-3.2-noarch:core-4.0-noarch:core-2.0-x86_64:core-3.2-x86_64:core-4.0-x86_64:desktop-4.0-amd64:desktop-4.0-noarch:graphics-2.0-amd64:graphics-2.0-noarch:graphics-3.2-amd64:graphics-3.2-noarch:graphics-4.0-amd64:graphics-4.0-noarch
                Distributor ID: openSUSE project
                Description:    openSUSE 12.3 (x86_64)
                Release:        12.3
                Codename:       Dartmouth


I originally reported this @ Opensuse bugzilla

        https://bugzilla.novell.com/show_bug.cgi?id=786460

but was told to report it upstream.  IMO, the issue is directly related
to Opensuse's use of LIBDIR=lib64 on X86_64 systems, and should be
patched THERE, but ... here's the issue:

For installed libtool, checking

        grep ^sys_lib_dlsearch_path_spec /usr/bin/libtool
            sys_lib_dlsearch_path_spec="/lib /usr/lib /usr/local/lib64
            /usr/local/lib "

the as-installed default fails to include the libdirs as used on X86_64
systems on Opensuse (and perhaps others that do the same ...).

On x86_64 that shouldn't be "/lib /usr/lib", but rather "/lib64
/usr/lib64".

arguably, /usr/lib/lib64 should lead the order ...