Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/MC/MCParser/MCAsmLexer.h b/linux-x64/clang/include/llvm/MC/MCParser/MCAsmLexer.h
index 10550b3..8ff0df2 100644
--- a/linux-x64/clang/include/llvm/MC/MCParser/MCAsmLexer.h
+++ b/linux-x64/clang/include/llvm/MC/MCParser/MCAsmLexer.h
@@ -52,7 +52,6 @@
   bool IsAtStartOfStatement = true;
   AsmCommentConsumer *CommentConsumer = nullptr;
 
-  bool AltMacroMode;
   MCAsmLexer();
 
   virtual AsmToken LexToken() = 0;
@@ -67,17 +66,9 @@
   MCAsmLexer &operator=(const MCAsmLexer &) = delete;
   virtual ~MCAsmLexer();
 
-  bool IsaAltMacroMode() {
-    return AltMacroMode;
-  }
-
-  void SetAltMacroMode(bool AltMacroSet) {
-    AltMacroMode = AltMacroSet;
-  }
-
   /// Consume the next token from the input stream and return it.
   ///
-  /// The lexer will continuosly return the end-of-file token once the end of
+  /// The lexer will continuously return the end-of-file token once the end of
   /// the main input file has been reached.
   const AsmToken &Lex() {
     assert(!CurTok.empty());