Insert a read barrier in the JNI bridge.

Bug: 20720510
Bug: 12687968
Change-Id: Ia9edb614853bad45ec25d6e2142361a8bda1eccf
diff --git a/runtime/arch/mips64/entrypoints_init_mips64.cc b/runtime/arch/mips64/entrypoints_init_mips64.cc
index b328708..321c27b 100644
--- a/runtime/arch/mips64/entrypoints_init_mips64.cc
+++ b/runtime/arch/mips64/entrypoints_init_mips64.cc
@@ -180,6 +180,9 @@
   // Atomic 64-bit load/store
   qpoints->pA64Load = QuasiAtomic::Read64;
   qpoints->pA64Store = QuasiAtomic::Write64;
+
+  // Read barrier
+  qpoints->pReadBarrierJni = ReadBarrierJni;
 };
 
 }  // namespace art