Proposal to restructure JDK source trees in phases

[Mandy Chung]

This is the proposal we discussed today of replacing the current
post-jdk-build jdk modularization in phases migrating from the
current source tree structure to module-path-based structure.
This will benefit the JDK developer's productivity on modular
JDK development.

http://cr.openjdk.java.net/~mchung/jigsaw/one-pagers/jdk-modules-build.md

This depends on the "Exploded Modules" support that will be
discussed separately.

Mandy