Write out global initializers and data rel directly to ELF file.

src/IceTargetLowering.h

 //===- subzero/src/IceTargetLowering.h - Lowering interface -----*- C++ -*-===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 //
 // This file declares the TargetLowering and LoweringContext
@@ skipping 233 matching lines @@
 class TargetGlobalLowering {
   TargetGlobalLowering() = delete;
   TargetGlobalLowering(const TargetGlobalLowering &) = delete;
   TargetGlobalLowering &operator=(const TargetGlobalLowering &) = delete;
 
 public:
   static TargetGlobalLowering *createLowering(GlobalContext *Ctx);
   virtual ~TargetGlobalLowering();
 
   virtual void lowerInit(const VariableDeclaration &Var) const = 0;
+  virtual void lowerInitELF(const VariableDeclarationList &Vars) const = 0;
   virtual void lowerConstants(GlobalContext *Ctx) const = 0;
 
 protected:
   TargetGlobalLowering(GlobalContext *Ctx) : Ctx(Ctx) {}
   GlobalContext *Ctx;
 };
 
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERING_H