RFR: JDK8011946 - java.util.Currency javadoc has broken link to iso.org

[Dan Xu]

Hi All,

Here is ajava doc fix. I have changed the broken link and pointed it to 
the page for standard ISO 4217. Thanks!

Webrev: http://cr.openjdk.java.net/~dxu/8011946/webrev/
Bug: http://bugs.sun.com/view_bug.do?bug_id=8011946

-Dan