hg: jigsaw/jigsaw/jdk: Implement optional dependence

[mandy.chung at oracle.com]

Changeset: 2b3cc0508c55
Author:    mchung
Date:      2010-06-07 21:38 -0700
URL:       http://hg.openjdk.java.net/jigsaw/jigsaw/jdk/rev/2b3cc0508c55

Implement optional dependence
Reviewed-by: mr

! src/share/classes/org/openjdk/jigsaw/Resolver.java
! test/org/openjdk/jigsaw/_Configurator.java
+ test/org/openjdk/jigsaw/optional-deps.sh