Update MCLinker to work with LLVM 3.4.

This corresponds to merging upstream MCLinker with the following SHA:
6dcbf36cdb146d6f175ba2f18a9004753cafeaff

Change-Id: I1bc8c2ce4accc563450bc71ee295a6e47a0c0469

include/mcld/Script/OutputFormatCmd.h

diff --git a/include/mcld/Script/OutputFormatCmd.h b/include/mcld/Script/OutputFormatCmd.h
new file mode 100644
index 0000000..b716e81
--- /dev/null
+++ b/include/mcld/Script/OutputFormatCmd.h
@@ -0,0 +1,63 @@
+//===- OutputFormatCmd.h --------------------------------------------------===//
+//
+//                     The MCLinker Project
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+#ifndef MCLD_SCRIPT_OUTPUTFORMATCMD_H
+#define MCLD_SCRIPT_OUTPUTFORMATCMD_H
+#ifdef ENABLE_UNITTEST
+#include <gtest.h>
+#endif
+
+#include <mcld/Script/ScriptCommand.h>
+#include <string>
+#include <vector>
+
+namespace mcld
+{
+
+class Module;
+
+/** \class OutputFormatCmd
+ *  \brief This class defines the interfaces to OutputFormat command.
+ */
+
+class OutputFormatCmd : public ScriptCommand
+{
+public:
+  typedef std::vector<std::string> FormatList;
+  typedef FormatList::const_iterator const_iterator;
+  typedef FormatList::iterator iterator;
+
+public:
+  OutputFormatCmd(const std::string& pFormat);
+  OutputFormatCmd(const std::string& pDefault,
+                  const std::string& pBig,
+                  const std::string& pLittle);
+  ~OutputFormatCmd();
+
+  const_iterator begin() const { return m_FormatList.begin(); }
+  iterator       begin()       { return m_FormatList.begin(); }
+  const_iterator end()   const { return m_FormatList.end(); }
+  iterator       end()         { return m_FormatList.end(); }
+
+  void dump() const;
+
+  static bool classof(const ScriptCommand* pCmd)
+  {
+    return pCmd->getKind() == ScriptCommand::OUTPUT_FORMAT;
+  }
+
+  void activate(Module& pModule);
+
+private:
+  FormatList m_FormatList;
+};
+
+} // namespace of mcld
+
+#endif
+