keep building when using the old modmake.rules

configure.ac

@@ -1405,6 +1405,7 @@ AM_CONDITIONAL(HAVE_G729, [ test -d ${switch_srcdir}/libs/libg729 ])
 
 #some vars to sub into the Makefile.am's
 #LIBS+=> core.log || error="yes";if test -n "$(VERBOSE)" -o "$$error" = "yes";then cat core.log;fi;if test "$$error" = "yes";then exit 1;fi
+LIBTOOL='$(SHELL) $(switch_builddir)/libtool'
 TOUCH_TARGET='if test -f "$@";then touch "$@";fi;'
 CONF_MODULES='$$(grep -v "\#" $(switch_builddir)/modules.conf | sed -e "s|^.*/||" | sort | uniq )'
 CONF_DISABLED_MODULES='$$(grep "\#" $(switch_builddir)/modules.conf | grep -v "\#\#" | sed -e "s|^.*/||" | sort | uniq )'