Add TransactionOutPoint.setIndex

core/src/main/java/com/google/bitcoin/core/TransactionOutPoint.java

@@ -180,6 +180,13 @@ public class TransactionOutPoint extends ChildMessage implements Serializable {
         return index;
     }
     
+    /**
+     * @param index the index to set
+     */
+    void setIndex(long index) {
+        this.index = index;
+    }
+
     /**
      * Ensure object is fully parsed before invoking java serialization.  The backing byte array
      * is transient so if the object has parseLazy = true and hasn't invoked checkParse yet