Fix usage of literal cloning for large double arrays.

test/mjsunit/regress/regress-crbug-672792.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: --allow-natives-syntax
+
+// Generate a function {f} containing a large array literal of doubles.
+eval("function f() { return [" + String("0.1,").repeat(65535) + "] }");
+
+// Running the function once will initialize the boilerplate.
+assertEquals(65535, f().length);
+
+// Running the function again will perform cloning.
+assertEquals(65535, f().length);
+
+// Running the function as optimized code next.
+%OptimizeFunctionOnNextCall(f);
+assertEquals(65535, f().length);