Update V8 to r5017 as required by WebKit r62496

Change-Id: I1b4b7718d1d77ceef07f543e9150a2cb3a628f3a
diff --git a/src/builtins.cc b/src/builtins.cc
index 7116dc9..ad52ea1 100644
--- a/src/builtins.cc
+++ b/src/builtins.cc
@@ -195,6 +195,7 @@
   }
 
   // 'array' now contains the JSArray we should initialize.
+  ASSERT(array->HasFastElements());
 
   // Optimize the case where there is one argument and the argument is a
   // small smi.
@@ -1262,6 +1263,11 @@
 }
 
 
+static void Generate_StoreIC_Normal(MacroAssembler* masm) {
+  StoreIC::GenerateNormal(masm);
+}
+
+
 static void Generate_StoreIC_Megamorphic(MacroAssembler* masm) {
   StoreIC::GenerateMegamorphic(masm);
 }