Unweaken vtables as per http://llvm.org/docs/CodingStandards.html#ll_virtual_anch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146960 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Transforms/Utils/Cloning.cpp b/unittests/Transforms/Utils/Cloning.cpp
index 1b85869..4243b2d 100644
--- a/unittests/Transforms/Utils/Cloning.cpp
+++ b/unittests/Transforms/Utils/Cloning.cpp
@@ -17,6 +17,7 @@
 
 using namespace llvm;
 
+namespace {
 class CloneInstruction : public ::testing::Test {
 protected:
   virtual void SetUp() {
@@ -47,6 +48,7 @@
   LLVMContext context;
   Value *V;
 };
+}
 
 TEST_F(CloneInstruction, OverflowBits) {
   V = new Argument(Type::getInt32Ty(context));