Fix remaining issues in the custom snapshot.

test/cctest/test-serialize.cc

Index: test/cctest/test-serialize.cc
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index a06cfbb8cd09dc0a51f9a7f3122b4aada65d58de..eb5977901b56e49689ecd02515370bb765d62bab 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -565,7 +565,9 @@ UNINITIALIZED_TEST(CustomContextSerialization) {
             "(function() {"
             "  e = function(s) { eval (s); }"
             "})();"
-            "var o = this;");
+            "var o = this;"
+            "var r = Math.random();"
+            "var f = (function(a, b) {}).bind(1, 2, 3);");
       }
       // Make sure all builtin scripts are cached.
       {