lxdialog: remove objectfiles on clean

Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

extra/config/Makefile

@@ -74,7 +74,7 @@ $(obj)/%:: $(top_srcdir)$(src)/%_shipped
 	$(Q)cat $< > $@
 endif
 menuconfig_clean:
-	$(do_rm) $(clean-files) conf $(wildcard *.o)
+	$(do_rm) $(clean-files) $(lxdialog) conf $(wildcard *.o)
 distclean: clean
 	$(do_rm) $(lxdialog) $(conf-objs) $(mconf-objs) \
 		$(kxgettext-objs) \