Update clang for API change.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164218 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGVTables.cpp b/lib/CodeGen/CGVTables.cpp
index 43708ff..76d2e9b 100644
--- a/lib/CodeGen/CGVTables.cpp
+++ b/lib/CodeGen/CGVTables.cpp
@@ -255,7 +255,9 @@
   llvm::Function *BaseFn = cast<llvm::Function>(Callee);
 
   // Clone to thunk.
-  llvm::Function *NewFn = llvm::CloneFunction(BaseFn);
+  llvm::ValueToValueMapTy VMap;
+  llvm::Function *NewFn = llvm::CloneFunction(BaseFn, VMap,
+                                              /*ModuleLevelChanges=*/false);
   CGM.getModule().getFunctionList().push_back(NewFn);
   Fn->replaceAllUsesWith(NewFn);
   NewFn->takeName(Fn);