Update QtPositioning QML API meta data including new 5.3 features.

Change-Id: Ic841572e3079c0f600c696b477d9f7220d130029
Reviewed-by: Aaron McCarthy <mccarthy.aaron@gmail.com>
Reviewed-by: Jim Ehrismann <jehrismann@blackberry.com>
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>