Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/Support/ToolOutputFile.h b/linux-x64/clang/include/llvm/Support/ToolOutputFile.h
index 7fd5f20..cf3bc2f 100644
--- a/linux-x64/clang/include/llvm/Support/ToolOutputFile.h
+++ b/linux-x64/clang/include/llvm/Support/ToolOutputFile.h
@@ -35,7 +35,7 @@
     /// The flag which indicates whether we should not delete the file.
     bool Keep;
 
-    explicit CleanupInstaller(StringRef ilename);
+    explicit CleanupInstaller(StringRef Filename);
     ~CleanupInstaller();
   } Installer;