[9] Review request: 8178282: Add '@since 9' javadoc tags to JavaFX module descriptions

[Kevin Rushforth]

Jonathan & Chris,

Please review the following to add the missing @since tags, and simple 
javadoc description for jdk.packager.*

https://bugs.openjdk.java.net/browse/JDK-8178282
http://cr.openjdk.java.net/~kcr/8178282/webrev.00/

Thanks.

-- Kevin