Enyo 525 Use native digit in Date and Time picker

Issue
------
DatePicker and TimePicker shows western digit even though its locale is "fa-IR"

Cause
-------
`useNative: false` property in ilib.DateFmt prevent to use native character

Fix
----
Remove `useNative: false`

Enyo-DCO-1.1-Signed-off-by: David Um david.um@lge.com