Add native support for FinalizerList.makeCircularListIfUnenqueued

Called from FinalizerReference.enqueueSentinelReference to prevent
a race where the GC updates pendingNext of the sentinel reference
before enqueueSentinelReference.

Bug: 17462553

(cherry picked from commit 3256166df40981f1f1997a5f00303712277c963f)

Change-Id: I7ad2fd250c2715d1aeb919bd548ef9aab24f30a2
diff --git a/runtime/runtime.cc b/runtime/runtime.cc
index b4a09e5..a1ea3cf 100644
--- a/runtime/runtime.cc
+++ b/runtime/runtime.cc
@@ -957,6 +957,7 @@
   REGISTER(register_java_lang_System);
   REGISTER(register_java_lang_Thread);
   REGISTER(register_java_lang_VMClassLoader);
+  REGISTER(register_java_lang_ref_FinalizerReference);
   REGISTER(register_java_lang_ref_Reference);
   REGISTER(register_java_lang_reflect_Array);
   REGISTER(register_java_lang_reflect_Constructor);