Import prebuilt clang toolchain for linux.
diff --git a/linux-x64/clang/include/llvm/DebugInfo/CodeView/DebugUnknownSubsection.h b/linux-x64/clang/include/llvm/DebugInfo/CodeView/DebugUnknownSubsection.h
new file mode 100644
index 0000000..ea9a96c
--- /dev/null
+++ b/linux-x64/clang/include/llvm/DebugInfo/CodeView/DebugUnknownSubsection.h
@@ -0,0 +1,32 @@
+//===- DebugUnknownSubsection.h -----------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGUNKNOWNFRAGMENT_H
+#define LLVM_DEBUGINFO_CODEVIEW_MODULEDEBUGUNKNOWNFRAGMENT_H
+
+#include "llvm/DebugInfo/CodeView/DebugSubsection.h"
+#include "llvm/Support/BinaryStreamRef.h"
+
+namespace llvm {
+namespace codeview {
+
+class DebugUnknownSubsectionRef final : public DebugSubsectionRef {
+public:
+ DebugUnknownSubsectionRef(DebugSubsectionKind Kind, BinaryStreamRef Data)
+ : DebugSubsectionRef(Kind), Data(Data) {}
+
+ BinaryStreamRef getData() const { return Data; }
+
+private:
+ BinaryStreamRef Data;
+};
+}
+}
+
+#endif