Improve the CallSite constructor

test/mjsunit/callsite.js

+// 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 constructor = Error().stack[0].constructor;
+
+// Second argument needs to be a function.
+assertThrows(()=>constructor({}, {}, 1, false), TypeError);
+
+var receiver = {};
+function f() {}
+
+var site = constructor.call(null, receiver, f, {valueOf() { return 0 }}, false);
+assertEquals(receiver, site.getThis());
+assertEquals(1, site.getLineNumber());
+assertEquals(1, site.getColumnNumber());