Using Western-Arabic digits instead of Perso-Arabic on devices with Persian locale

[iriman]

Hi, on devices with Persian locale, by exporting tracks as GPX, time stamps and file names use Perso-Arabic digits and this makes some difficulties to read generated GPX files later. For example some softwares don't understand Perso-Arabic digits and omit them or some other can't open them because of file name.

example:
file name: ۲۰۰۰-۰۱-۰۱_۱۰-۰۱-۰۲_۲۰۰۰-۰۱-۰۱_۱۰-۰۱-۰۲.gpx
part of content:

<wpt lat="37.13575057" lon="49.68532362">
		<ele>47.0</ele>
		<time>۲۰۰۰-۰۱-۰۱T۱۰:۳۸:۲۰Z</time>
		<name><![CDATA[نانوایی لواش]]></name>
		<cmt><![CDATA[دقت: 6.067999839782715م]]></cmt>
		<sat>14</sat>
	</wpt>
	<trk>
		<name><![CDATA[با OSM Tracker for Android™‎ ضبط شده است]]></name>
		<trkseg>
			<trkpt lat="37.2766247" lon="49.93418447">
				<ele>-8.0</ele>
				<time>۲۰۰۰-۰۱-۰۱T۱۰:۲۰:۱۱Z</time>
				<extensions>
					<speed>4.820000171661377</speed>
				</extensions>
			</trkpt>