Insert a read barrier in the JNI bridge.

Bug: 20720510
Bug: 12687968
Change-Id: Ia9edb614853bad45ec25d6e2142361a8bda1eccf
diff --git a/runtime/thread.cc b/runtime/thread.cc
index c8aad1b..5959259 100644
--- a/runtime/thread.cc
+++ b/runtime/thread.cc
@@ -2072,6 +2072,7 @@
   QUICK_ENTRY_POINT_INFO(pNewStringFromString)
   QUICK_ENTRY_POINT_INFO(pNewStringFromStringBuffer)
   QUICK_ENTRY_POINT_INFO(pNewStringFromStringBuilder)
+  QUICK_ENTRY_POINT_INFO(pReadBarrierJni)
 #undef QUICK_ENTRY_POINT_INFO
 
   os << offset;