Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/ADT/VariadicFunction.h b/linux-x64/clang/include/llvm/ADT/VariadicFunction.h
index 403130c..9028abe 100644
--- a/linux-x64/clang/include/llvm/ADT/VariadicFunction.h
+++ b/linux-x64/clang/include/llvm/ADT/VariadicFunction.h
@@ -53,7 +53,7 @@
 #define LLVM_COMMA_JOIN31(x) LLVM_COMMA_JOIN30(x), x ## 30
 #define LLVM_COMMA_JOIN32(x) LLVM_COMMA_JOIN31(x), x ## 31
 
-/// \brief Class which can simulate a type-safe variadic function.
+/// Class which can simulate a type-safe variadic function.
 ///
 /// The VariadicFunction class template makes it easy to define
 /// type-safe variadic functions where all arguments have the same