Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/CodeGen/FunctionLoweringInfo.h b/linux-x64/clang/include/llvm/CodeGen/FunctionLoweringInfo.h
index 2da00b7..5fe4f89 100644
--- a/linux-x64/clang/include/llvm/CodeGen/FunctionLoweringInfo.h
+++ b/linux-x64/clang/include/llvm/CodeGen/FunctionLoweringInfo.h
@@ -1,4 +1,4 @@
-//===- FunctionLoweringInfo.h - Lower functions from LLVM IR to CodeGen ---===//
+//===- FunctionLoweringInfo.h - Lower functions from LLVM IR ---*- C++ -*--===//
 //
 //                     The LLVM Compiler Infrastructure
 //