patch 8.0.1387: wordcount test is old style

Problem:    Wordcount test is old style.
Solution:   Change into a new style test. (Yegappan Lakshmanan, closes #2434)
diff --git a/src/testdir/Make_ming.mak b/src/testdir/Make_ming.mak
index a05ae32..d66d667 100644
--- a/src/testdir/Make_ming.mak
+++ b/src/testdir/Make_ming.mak
@@ -63,7 +63,7 @@
 fixff:
 	-$(VIMPROG) -u dos.vim $(NO_INITS) "+argdo set ff=dos|upd" +q *.in *.ok
 	-$(VIMPROG) -u dos.vim $(NO_INITS) "+argdo set ff=unix|upd" +q \
-		dotest.in test_wordcount.ok
+		dotest.in
 
 clean:
 	-@if exist *.out $(DEL) *.out