Fix 071-dexfile by having run-test use a unique directory

If userdata.img is flashed, the /data/art-test is owned by the system
user.  However, 071 requires the directory it runs in to have be owned
by the running user (root in eng builds).

Change-Id: I5230908291fd2ff6c5ebda98cfc3ef4c7ea7482e
diff --git a/test/086-null-super/src/Main.java b/test/086-null-super/src/Main.java
index 1109dec..2a15b9e 100644
--- a/test/086-null-super/src/Main.java
+++ b/test/086-null-super/src/Main.java
@@ -55,7 +55,7 @@
         private static final String CLASS_NAME =
                 "Main$BrokenDexLoader$Inaccessible";
 
-        private static final String DEX_FILE = "/data/art-test/086-null-super.jar";
+        private static final String DEX_FILE = "/data/run-test/086-null-super.jar";
 
         public BrokenDexLoader(ClassLoader parent) {
             super(parent);