Make NumberFormat use the ICU currency data, fix bug in NumberFormat

test/intl/number-format/format-currency.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.
+
+// Make sure currency formatting is correct (for USD only displays two decimal
+// places, for JPY 0, and for EUR 2).
+
+var nf_USD = new Intl.NumberFormat(['en'], {style: 'currency', currency: 'USD'});
+
+assertEquals("$54,306.40", nf_USD.format(parseFloat(54306.4047970)));
+
+var nf_JPY = new Intl.NumberFormat(['ja'], {style: 'currency', currency: 'JPY'});
+
+assertEquals("¥54,306", nf_JPY.format(parseFloat(54306.4047970)));
+
+var nf_EUR = new Intl.NumberFormat(['pt'], {style: 'currency', currency: 'EUR'});
+
+assertEquals("€1.000,00", nf_EUR.format(1000.00));