File libtool-autoconf.patch of Package libchewing

diff -ru libchewing-0.2.7.orig/configure.ac libchewing-0.2.7/configure.ac
--- libchewing-0.2.7.orig/configure.ac	2005-08-08 15:35:00.000000000 +0200
+++ libchewing-0.2.7/configure.ac	2006-01-23 18:55:11.000000000 +0100
@@ -43,6 +43,7 @@
 AC_PROG_LIBTOOL
 AC_LIB_LTDL
 AC_SUBST(LIBTOOL_DEPS)
+AC_SUBST(LIBTOOL_EXPORT_OPTIONS)
 
 # libtool option to control which symbols are exported
 # right now, symbols starting with _ are not exported