review: Rework build to enable future jigsaw aware JDK9 build

[David Hill]

Kevin,
     would you review this build change please.

https://bugs.openjdk.java.net/browse/JDK-8165809

http://cr.openjdk.java.net/~ddhill/8165809.1

-- 
David Hill<David.Hill at Oracle.com>
Java Embedded Development

"A man's feet should be planted in his country, but his eyes should survey the world."
-- George Santayana (1863 - 1952)