Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/ADT/BitVector.h b/linux-x64/clang/include/llvm/ADT/BitVector.h
index 124c2a8..438c7d8 100644
--- a/linux-x64/clang/include/llvm/ADT/BitVector.h
+++ b/linux-x64/clang/include/llvm/ADT/BitVector.h
@@ -779,7 +779,7 @@
   }
 
 private:
-  /// \brief Perform a logical left shift of \p Count words by moving everything
+  /// Perform a logical left shift of \p Count words by moving everything
   /// \p Count words to the right in memory.
   ///
   /// While confusing, words are stored from least significant at Bits[0] to
@@ -810,7 +810,7 @@
     clear_unused_bits();
   }
 
-  /// \brief Perform a logical right shift of \p Count words by moving those
+  /// Perform a logical right shift of \p Count words by moving those
   /// words to the left in memory.  See wordShl for more information.
   ///
   void wordShr(uint32_t Count) {