RFR: JDK-8155237 - jlink plugin to order resources should take a class list as input

[Jim Laskey (Oracle)]

Modifies the jlink sort-plugin to accept a classlist to order files in the 
jimage.

http://cr.openjdk.java.net/~jlaskey/8155237/webrev/index.html
https://bugs.openjdk.java.net/browse/JDK-8155237