Review Request: JDK-6373396: (cl spec) clarify spec of ClassLoader.getPackages() about run-time package

[mandy chung]

Minor update to the spec of ClassLoader::getPackages and other relevant 
methods to clarify that the Package(s) are the packages that *have been* 
defined.  Also include a link to JVMS 5.3 about run-time packages, as in 
Package class spec.

http://cr.openjdk.java.net/~mchung/jdk10/webrevs/6373396/webrev.00/

Mandy