test: use rundir and errorcheckdir for a few more tests.
Update #4139.
R=golang-dev, minux.ma
CC=golang-dev
https://golang.org/cl/6620070
diff --git a/test/fixedbugs/bug160.go b/test/fixedbugs/bug160.go
index c5e166a..fde797b 100644
--- a/test/fixedbugs/bug160.go
+++ b/test/fixedbugs/bug160.go
@@ -1,10 +1,7 @@
-// $G $D/bug160.dir/x.go && $G $D/bug160.dir/y.go && $L y.$A && ./$A.out
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// rundir
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-nothing to see here
+package ignored
