Update clang to r339409b.

Change-Id: Ied8a188bb072c40035320acedc86164b66d920af
diff --git a/linux-x64/clang/include/llvm/DebugInfo/PDB/PDBSymbolLabel.h b/linux-x64/clang/include/llvm/DebugInfo/PDB/PDBSymbolLabel.h
index c2b1c28..8b2617f 100644
--- a/linux-x64/clang/include/llvm/DebugInfo/PDB/PDBSymbolLabel.h
+++ b/linux-x64/clang/include/llvm/DebugInfo/PDB/PDBSymbolLabel.h
@@ -19,12 +19,8 @@
 namespace pdb {
 
 class PDBSymbolLabel : public PDBSymbol {
-public:
-  PDBSymbolLabel(const IPDBSession &PDBSession,
-                 std::unique_ptr<IPDBRawSymbol> LabelSymbol);
-
   DECLARE_PDB_SYMBOL_CONCRETE_TYPE(PDB_SymType::Label)
-
+public:
   void dump(PDBSymDumper &Dumper) const override;
 
   FORWARD_SYMBOL_METHOD(getAddressOffset)