Subzero: Emit ARM build-attributes in the file scope (as header).

src/IceTargetLoweringX8632.h

Index: src/IceTargetLoweringX8632.h
diff --git a/src/IceTargetLoweringX8632.h b/src/IceTargetLoweringX8632.h
index 577334091288c28cf61b853861cfd2d6287c14d6..3a44b6f567694b2790aa1f3485207aba9f247430 100644
--- a/src/IceTargetLoweringX8632.h
+++ b/src/IceTargetLoweringX8632.h
@@ -581,8 +581,8 @@ class TargetDataX8632 : public TargetDataLowering {
   TargetDataX8632 &operator=(const TargetDataX8632 &) = delete;
 
 public:
-  static TargetDataLowering *create(GlobalContext *Ctx) {
-    return new TargetDataX8632(Ctx);
+  static std::unique_ptr<TargetDataLowering> create(GlobalContext *Ctx) {
+    return std::unique_ptr<TargetDataLowering>(new TargetDataX8632(Ctx));
   }
 
   void lowerGlobals(std::unique_ptr<VariableDeclarationList> Vars) const final;
@@ -597,6 +597,23 @@ private:
   template <typename T> static void emitConstantPool(GlobalContext *Ctx);
 };
 
+class TargetHeaderX8632 : public TargetHeaderLowering {
+  TargetHeaderX8632() = delete;
+  TargetHeaderX8632(const TargetHeaderX8632 &) = delete;
+  TargetHeaderX8632 &operator=(const TargetHeaderX8632 &) = delete;
+
+public:
+  static std::unique_ptr<TargetHeaderLowering> create(GlobalContext *Ctx) {
+    return std::unique_ptr<TargetHeaderLowering>(new TargetHeaderX8632(Ctx));
+  }
+
+protected:
+  explicit TargetHeaderX8632(GlobalContext *Ctx);
+
+private:
+  ~TargetHeaderX8632() final = default;
+};
+
 } // end of namespace Ice
 
 #endif // SUBZERO_SRC_ICETARGETLOWERINGX8632_H