ObjectTransformLayerTest.cpp: Rework r258633. [-Winconsistent-missing-override]

Sorry for the noise.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@258635 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/ExecutionEngine/Orc/ObjectTransformLayerTest.cpp

@@ -301,7 +301,7 @@ TEST(ObjectTransformLayerTest, Main) {
       }
       void registerEHFrames(uint8_t *, uint64_t, size_t) override {}
       void deregisterEHFrames(uint8_t *, uint64_t, size_t) override {}
-      virtual bool finalizeMemory(std::string *) { return false; }
+      bool finalizeMemory(std::string *) override { return false; }
     };
 
     // Construct the jit layers.