Refactor all instances of `typedef y x` to the C++11 `using x = y` syntax.

src/IceFixups.h

 //===- subzero/src/IceFixups.h - Assembler fixup kinds ----------*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
 /// This file declares generic fixup types.
 ///
 //===----------------------------------------------------------------------===//
 
 #ifndef SUBZERO_SRC_ICEFIXUPS_H
 #define SUBZERO_SRC_ICEFIXUPS_H
 
 #include "IceDefs.h"
 
 namespace Ice {
 
 /// Each target and container format has a different namespace of relocations.
 /// This holds the specific target+container format's relocation number.
-typedef uint32_t FixupKind;
+using FixupKind = uint32_t;
 
 /// Assembler fixups are positions in generated code/data that hold relocation
 /// information that needs to be processed before finalizing the code/data.
 struct AssemblerFixup {
   AssemblerFixup &operator=(const AssemblerFixup &) = delete;
 
 public:
   AssemblerFixup() = default;
   AssemblerFixup(const AssemblerFixup &) = default;
   intptr_t position() const { return position_; }
@@ skipping 11 matching lines @@
   void set_value(const Constant *Value) { value_ = Value; }
 
   void emit(GlobalContext *Ctx, RelocOffsetT OverrideOffset) const;
 
 private:
   intptr_t position_ = 0;
   FixupKind kind_ = 0;
   const Constant *value_ = nullptr;
 };
 
-typedef std::vector<AssemblerFixup> FixupList;
-typedef std::vector<AssemblerFixup *> FixupRefList;
+using FixupList = std::vector<AssemblerFixup>;
+using FixupRefList = std::vector<AssemblerFixup *>;
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICEFIXUPS_H