[8u60,9] review request: RT-40691: Update the JDK version used to build FX to JDK 8u40

[Kevin Rushforth]

David, Chien, and Amy:

As announced previously, this fix will update our builds to use (and 
require) JDK 8u40 to build FX.

https://javafx-jira.kenai.com/browse/RT-40691
http://cr.openjdk.java.net/~kcr/RT-40691/webrev.00/

Please review and comment in JIRA.

Thanks.

-- Kevin