Get rid of annoying IRIX droppings on distclean
diff --git a/unix/src/Makefile b/unix/src/Makefile
index a929133..9c9912d 100644
--- a/unix/src/Makefile
+++ b/unix/src/Makefile
@@ -81,6 +81,6 @@ clean-local:
distclean-local:
$(RM) $(TARGET)
- $(RM) -r .libs
+ $(RM) -r .libs ii_files
include $(top_builddir)/Make.rules