Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/IR/ConstantRange.h b/linux-x64/clang/include/llvm/IR/ConstantRange.h
index 6889e26..1adda32 100644
--- a/linux-x64/clang/include/llvm/IR/ConstantRange.h
+++ b/linux-x64/clang/include/llvm/IR/ConstantRange.h
@@ -54,7 +54,7 @@
   /// Initialize a range to hold the single specified value.
   ConstantRange(APInt Value);
 
-  /// @brief Initialize a range of values explicitly. This will assert out if
+  /// Initialize a range of values explicitly. This will assert out if
   /// Lower==Upper and Lower != Min or Max value for its type. It will also
   /// assert out if the two APInt's are not the same bit width.
   ConstantRange(APInt Lower, APInt Upper);