[9] review request: 8131888: Deliver javafx.swt as a modular jar in JDK 9

[Kevin Rushforth]

Please review the following:

https://bugs.openjdk.java.net/browse/JDK-8131888
http://cr.openjdk.java.net/~kcr/8131888/webrev.00/

This adds support for the javafx.embed.swt package back into the JDK, 
which will be delivered as an automatic module in 
$JAVA_HOME/lib/javafx-swt.jar (final location is TBD).

Details are in JBS.

-- Kevin