Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/Option/OptTable.h b/linux-x64/clang/include/llvm/Option/OptTable.h
index 743c477..fdb05d8 100644
--- a/linux-x64/clang/include/llvm/Option/OptTable.h
+++ b/linux-x64/clang/include/llvm/Option/OptTable.h
@@ -217,8 +217,8 @@
   /// Render the help text for an option table.
   ///
   /// \param OS - The stream to write the help text to.
-  /// \param Name - The name to use in the usage line.
-  /// \param Title - The title to use in the usage line.
+  /// \param Usage - USAGE: Usage
+  /// \param Title - OVERVIEW: Title
   /// \param FlagsToInclude - If non-zero, only include options with any
   ///                         of these flags set.
   /// \param FlagsToExclude - Exclude options with any of these flags set.
@@ -226,11 +226,11 @@
   ///                         that don't have help texts. By default, we display
   ///                         only options that are not hidden and have help
   ///                         texts.
-  void PrintHelp(raw_ostream &OS, const char *Name, const char *Title,
+  void PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
                  unsigned FlagsToInclude, unsigned FlagsToExclude,
                  bool ShowAllAliases) const;
 
-  void PrintHelp(raw_ostream &OS, const char *Name, const char *Title,
+  void PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
                  bool ShowHidden = false, bool ShowAllAliases = false) const;
 };