Update V8 to r4730 as required by WebKit r60469
diff --git a/src/arm/macro-assembler-arm.h b/src/arm/macro-assembler-arm.h
index 9cf93da..494f2b6 100644
--- a/src/arm/macro-assembler-arm.h
+++ b/src/arm/macro-assembler-arm.h
@@ -185,6 +185,18 @@
     }
   }
 
+  // Load two consecutive registers with two consecutive memory locations.
+  void Ldrd(Register dst1,
+            Register dst2,
+            const MemOperand& src,
+            Condition cond = al);
+
+  // Store two consecutive registers to two consecutive memory locations.
+  void Strd(Register src1,
+            Register src2,
+            const MemOperand& dst,
+            Condition cond = al);
+
   // ---------------------------------------------------------------------------
   // Stack limit support