Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/CodeGen/CallingConvLower.h b/linux-x64/clang/include/llvm/CodeGen/CallingConvLower.h
index d30a273..efcf80b 100644
--- a/linux-x64/clang/include/llvm/CodeGen/CallingConvLower.h
+++ b/linux-x64/clang/include/llvm/CodeGen/CallingConvLower.h
@@ -304,7 +304,7 @@
   /// CheckReturn - Analyze the return values of a function, returning
   /// true if the return can be performed without sret-demotion, and
   /// false otherwise.
-  bool CheckReturn(const SmallVectorImpl<ISD::OutputArg> &ArgsFlags,
+  bool CheckReturn(const SmallVectorImpl<ISD::OutputArg> &Outs,
                    CCAssignFn Fn);
 
   /// AnalyzeCallOperands - Analyze the outgoing arguments to a call,