Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h b/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
index 1c5e77e..8cd08e5 100644
--- a/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
+++ b/linux-x64/clang/include/llvm/ObjectYAML/WasmYAML.h
@@ -8,7 +8,7 @@
 //===----------------------------------------------------------------------===//
 ///
 /// \file
-/// \brief This file declares classes for handling the YAML representation
+/// This file declares classes for handling the YAML representation
 /// of wasm binaries.
 ///
 //===----------------------------------------------------------------------===//
@@ -195,6 +195,7 @@
     return C && C->Name == "linking";
   }
 
+  uint32_t Version;
   std::vector<SymbolInfo> SymbolTable;
   std::vector<SegmentInfo> SegmentInfos;
   std::vector<InitFunction> InitFunctions;