hg: shenandoah/jdk8u/hotspot: Move JNI Weak References workaround to Shenandoah-specific root processor

[ashipile at redhat.com]

Changeset: c9d37fa89cf4
Author:    shade
Date:      2018-08-15 09:41 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk8u/hotspot/rev/c9d37fa89cf4

Move JNI Weak References workaround to Shenandoah-specific root processor

! src/share/vm/gc_implementation/shenandoah/shenandoahRootProcessor.cpp
! src/share/vm/memory/referenceProcessor.cpp
! test/gc/shenandoah/jni/TestJNIGlobalRefs.sh