hg: jigsaw/jake/hotspot: Add support for NULL module versions.

[harold.seigel at oracle.com]

Changeset: 662926b165dc
Author:    hseigel
Date:      2015-10-23 12:24 -0400
URL:       http://hg.openjdk.java.net/jigsaw/jake/hotspot/rev/662926b165dc

Add support for NULL module versions.

! src/share/vm/classfile/javaClasses.cpp
! src/share/vm/classfile/modules.cpp