hg: jigsaw/jake/hotspot: Update JNI AddModuleReads() and CanReadModule() to disallow NULL (JDK-8151816) and fix test failures (JDK-8151817)

[harold.seigel at oracle.com]

Changeset: 07df4997bf44
Author:    hseigel
Date:      2016-03-15 08:41 -0400
URL:       http://hg.openjdk.java.net/jigsaw/jake/hotspot/rev/07df4997bf44

Update JNI AddModuleReads() and CanReadModule() to disallow NULL (JDK-8151816) and fix test failures (JDK-8151817)

! src/share/vm/prims/jni.cpp
! src/share/vm/prims/jni.h
! test/runtime/modules/AccessCheck/DiffCL_UmodUpkg.java
! test/runtime/modules/AccessCheck/UmodUPkg.java
! test/runtime/modules/AccessCheck/myloaders/MyDiffClassLoader.java
! test/runtime/modules/AccessCheck/myloaders/MySameClassLoader.java
- test/runtime/modules/AccessCheck/p3/c3Loose.jcod
! test/runtime/modules/getModuleJNI/GetModule.java