[Interpreter] Handles BytecodeArrays when scanning objects in heap.

test/mjsunit/ignition/regress-599001-verifyheap.js

+// Copyright 2016 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.
+
+// Flags: --verify-heap --expose-gc
+
+// Tests that verify heap works for BytecodeArrays in the large object space.
+
+// Creates a list of variable declarations and calls it through eval to
+// generate a large BytecodeArray.
+var s = "";
+for (var i = 0; i < 65535; i++) {
+  s += ("var a" + i + ";");
+}
+
+(function() { eval(s); })();
+gc();