hg: jdk/jdk12: 8215395: Allow null oops in Dictionary and JNIHandle verification

[per.liden at oracle.com]

Changeset: c7ab0761ef88
Author:    pliden
Date:      2018-12-15 20:03 +0100
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/c7ab0761ef88

8215395: Allow null oops in Dictionary and JNIHandle verification
Reviewed-by: eosterlund, kbarrett, coleenp

! src/hotspot/share/classfile/dictionary.hpp
! src/hotspot/share/runtime/jniHandles.cpp