Return CallSite numbers as Number rather than Smi

test/mjsunit/regress/regress-crbug-570651.js

Index: test/mjsunit/regress/regress-crbug-570651.js
diff --git a/test/mjsunit/regress/regress-crbug-570651.js b/test/mjsunit/regress/regress-crbug-570651.js
new file mode 100644
index 0000000000000000000000000000000000000000..9860b428b137e104de74ac3b94f7b46bc9a8f42b
--- /dev/null
+++ b/test/mjsunit/regress/regress-crbug-570651.js
@@ -0,0 +1,10 @@
+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+Error.prepareStackTrace = (e,s) => s;
+var __v_3 = Error().stack[0].constructor;
+var __v_4 = {};
+function __f_3() {}
+var __v_5 = __v_3.call(null, __v_4, __f_3, {valueOf() { return 1611877293 }});
+ __v_5.getColumnNumber();