hg: jdk9/sandbox/jdk: 8159334: ModuleDescriptor retains overlapping sets for all and concealed packages

[chris.hegarty at oracle.com]

Changeset: 1349e5196750
Author:    redestad
Date:      2016-06-13 14:02 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/1349e5196750

8159334: ModuleDescriptor retains overlapping sets for all and concealed packages
Reviewed-by: alanb, mchung

! src/java.base/share/classes/java/lang/module/ModuleDescriptor.java
! src/java.base/share/classes/jdk/internal/misc/JavaLangModuleAccess.java
! src/java.base/share/classes/jdk/internal/module/Builder.java
! src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModuleDescriptorPlugin.java