Update V8 to r6101 as required by WebKit r74534

Change-Id: I7f84af8dd732f11898fd644b2c2b1538914cb78d
diff --git a/test/cctest/test-dataflow.cc b/test/cctest/test-dataflow.cc
index 003ac66..5894de2 100644
--- a/test/cctest/test-dataflow.cc
+++ b/test/cctest/test-dataflow.cc
@@ -52,6 +52,24 @@
   }
 
   {
+    BitVector v(64);
+    v.Add(27);
+    v.Add(30);
+    v.Add(31);
+    v.Add(33);
+    BitVector::Iterator iter(&v);
+    CHECK_EQ(27, iter.Current());
+    iter.Advance();
+    CHECK_EQ(30, iter.Current());
+    iter.Advance();
+    CHECK_EQ(31, iter.Current());
+    iter.Advance();
+    CHECK_EQ(33, iter.Current());
+    iter.Advance();
+    CHECK(iter.Done());
+  }
+
+  {
     BitVector v(15);
     v.Add(0);
     BitVector w(15);