Update V8 to r4730 as required by WebKit r60469
diff --git a/src/ia32/assembler-ia32.h b/src/ia32/assembler-ia32.h
index 6a7effd..9ece744 100644
--- a/src/ia32/assembler-ia32.h
+++ b/src/ia32/assembler-ia32.h
@@ -194,7 +194,6 @@
 class Immediate BASE_EMBEDDED {
  public:
   inline explicit Immediate(int x);
-  inline explicit Immediate(const char* s);
   inline explicit Immediate(const ExternalReference& ext);
   inline explicit Immediate(Handle<Object> handle);
   inline explicit Immediate(Smi* value);
@@ -551,6 +550,7 @@
   // Repetitive string instructions.
   void rep_movs();
   void rep_stos();
+  void stos();
 
   // Exchange two registers
   void xchg(Register dst, Register src);