RFR: 8156756: Enable build-time use of resource ordering plugin

[Claes Redestad]

Hi,

please review this change to enable the --order-resources plugin during 
build, which helps cold start scenarios by improving locality

Bug: https://bugs.openjdk.java.net/browse/JDK-8156756
Webrev: http://cr.openjdk.java.net/~redestad/8156756/webrev.01/

Ordering by classlist alone gives a good boost and could have been a 
sufficient improvement, while grouping different parts of java.base 
(while allowing others, like javax) to order later in the image seems 
marginally profitable as well.

Thanks!

/Claes