Fix System.load to use getStackClass1

Was incorrectly looking up 2 frames.

Bug: 25866849
Change-Id: If3f1fb5548449b035c6cab05a82a4829a6975382
diff --git a/ojluni/src/main/java/java/lang/System.java b/ojluni/src/main/java/java/lang/System.java
index f21e625..4b46817 100755
--- a/ojluni/src/main/java/java/lang/System.java
+++ b/ojluni/src/main/java/java/lang/System.java
@@ -1573,7 +1573,7 @@
      * @see        java.lang.SecurityManager#checkLink(java.lang.String)
      */
     public static void load(String filename) {
-        Runtime.getRuntime().load0(VMStack.getStackClass2(), filename);
+        Runtime.getRuntime().load0(VMStack.getStackClass1(), filename);
     }
 
     /**