vfs graphdriver: Make root dir mode 755

This matches the other backends.

Docker-DCO-1.1-Signed-off-by: Alexander Larsson <alexl@redhat.com> (github: alexlarsson)

daemon/graphdriver/vfs/driver.go

@@ -47,7 +47,7 @@ func (d *Driver) Create(id, parent string) error {
 	if err := os.MkdirAll(path.Dir(dir), 0700); err != nil {
 		return err
 	}
-	if err := os.Mkdir(dir, 0700); err != nil {
+	if err := os.Mkdir(dir, 0755); err != nil {
 		return err
 	}
 	if parent == "" {