Change uses of {to,from}Ascii to {to,from}Latin1 [other tools]

Change uses of {to,from}Ascii to {to,from}Latin1 [other tools]

This operation should be a no-op anyway, since at this point in time,
the fromAscii and toAscii functions simply call their fromLatin1 and
toLatin1 counterparts.

Task-number: QTBUG-21872
Change-Id: I1e82285ad996cb2796807260383d1d056b930d0e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>