QDateTime::toString for Qt::TextDate unconditionally uses the system
locale (because QDate::shortDayName and QDate::shortMonthName do).
Setting the default QLocale has no effect. If you ask me, those two
QDate methods are buggy, but they are documented that way.
Change-Id: I408dcb81ba654c929f25ffff1427366b04da5a43
Reviewed-by: Edward Welbourne <edward.welbourne@theqtcompany.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>