Use our own libtool that knows about cross compiling, not the libtool
that is included.

--- p3scan-2.9.05d/aclocal.m4	2006/10/12 04:17:35	1.1
+++ p3scan-2.9.05d/aclocal.m4	2006/10/12 04:18:28
@@ -73,8 +73,7 @@
 LIBTOOL_DEPS="$ac_aux_dir/ltmain.sh"
 
 # Always use our own libtool.
-LIBTOOL='$(SHELL) $(top_builddir)/libtool'
-AC_SUBST(LIBTOOL)dnl
+LIBTOOL="$host_alias-libtool"
 
 # Prevent multiple expansion
 define([AC_PROG_LIBTOOL], [])
@@ -140,7 +139,7 @@
 rm="rm -f"
 
 # Global variables:
-default_ofile=libtool
+default_ofile==${host_alias}-libtool
 can_build_shared=yes
 
 # All known linkers require a `.a' archive for static linking (except MSVC,