Introduce Push and Pop register macro instructions for all platforms

src/arm/macro-assembler-arm.h

Index: src/arm/macro-assembler-arm.h
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index daaac68e8ff763f972043f83e74439627db93de4..8b9fa2b22162bf0e1b1e1d8343bb3ebd1771fa10 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -144,6 +144,8 @@ class MacroAssembler: public Assembler {
             Condition cond = al);
 
   void Call(Label* target);
+  void Push(Register src) { push(src); }
+  void Pop(Register dst) { pop(dst); }
 
   // Register move. May do nothing if the registers are identical.
   void Move(Register dst, Handle<Object> value);