fix for the wrong test of Intl.NumberFormat (ToRawPrecision) (#857)

1) (123.44500) == 123.444999999999993179
2) (123.44500).toPrecision(5) === "123.44" gives correct value in Chrome and Firefox;

Ref https://github.com/tc39/ecma402/issues/128

test/intl402/NumberFormat/prototype/format/11.3.2_TRP.js

@@ -32,8 +32,8 @@ var testData = {
     "-123.45": "-123.45",
     "123.44499": "123.44",
     "-123.44499": "-123.44",
-    "123.44500": "123.45",
-    "-123.44500": "-123.45",
+    "123.44500": "123.44",
+    "-123.44500": "-123.44",
     "123.44501": "123.45",
     "-123.44501": "-123.45",
     "0.001234": "0.001234",