Update LLVM for 3.5 rebase (r209712).

Change-Id: I149556c940fb7dc92d075273c87ff584f400941f
diff --git a/unittests/ExecutionEngine/JIT/JITTest.cpp b/unittests/ExecutionEngine/JIT/JITTest.cpp
index 9e65fee..f438286 100644
--- a/unittests/ExecutionEngine/JIT/JITTest.cpp
+++ b/unittests/ExecutionEngine/JIT/JITTest.cpp
@@ -114,8 +114,8 @@
     return Result;
   }
   int stubsAllocated;
-  virtual uint8_t *allocateStub(const GlobalValue* F, unsigned StubSize,
-                                unsigned Alignment) {
+  uint8_t *allocateStub(const GlobalValue *F, unsigned StubSize,
+                        unsigned Alignment) override {
     stubsAllocated++;
     return Base->allocateStub(F, StubSize, Alignment);
   }