Add a new method to return the time zone abbreviation for the current
time spec. For LocalTime this is the abbreviation returned by mktime.
This new method will later be used in changes to the date formatter
and QTimeZone.
Note this change does not implement WinCE support.
[ChangeLog][QtCore][QDateTime] Add method timeZoneAbbreviation() to
return effective time zone abbreviation.
Change-Id: I265a5e96c72eb7236974f80f053f1fb341e3c816
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Mitch Curtis <mitch.curtis@digia.com>
5ec1c7727b