Add non debug version of libarttest

We now pass the libarttest as an argument to the java program. This
enables using libarttestd by default and libarttest when -O is
specified.

Change-Id: I0de1ae01e2bb5f7b9c7fd7487b6cb55051f60657
diff --git a/test/131-structural-change/src/Main.java b/test/131-structural-change/src/Main.java
index 8dfa280..6cbbd12 100644
--- a/test/131-structural-change/src/Main.java
+++ b/test/131-structural-change/src/Main.java
@@ -23,6 +23,7 @@
  */
 public class Main {
     public static void main(String[] args) {
+        System.loadLibrary(args[0]);
         new Main().run();
     }
 
@@ -49,9 +50,5 @@
         System.out.println("Done.");
     }
 
-    static {
-        System.loadLibrary("arttest");
-    }
-
     private native static boolean hasOat();
 }