hg: jigsaw/jake/hotspot: Allow modules to have versions of "".

[harold . seigel]

Changeset: d3eb015445d3
Author:    hseigel
Date:      2015-10-20 17:04 -0400
URL:       http://hg.openjdk.java.net/jigsaw/jake/hotspot/rev/d3eb015445d3

Allow modules to have versions of "".

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