updated for version 7.3.684
Problem:    "make test" does not delete lua.vim.
Solution:   Add lua.vim to the clean target. (Simon Ruderich)
diff --git a/src/testdir/Make_ming.mak b/src/testdir/Make_ming.mak
index 4128f9f..c150424 100644
--- a/src/testdir/Make_ming.mak
+++ b/src/testdir/Make_ming.mak
@@ -85,6 +85,7 @@
 	-$(DEL) tiny.vim
 	-$(DEL) mbyte.vim
 	-$(DEL) mzscheme.vim
+	-$(DEL) lua.vim
 	-$(DEL) X*
 	-$(DEL) viminfo