Introducing the new labs qml plugin, Qt.labs.location, and
associated qt module.
The intended use is to introduce and validate new QML API
before they can be moved into QtLocation.

Change-Id: If70d1dcedaf708be96e918dc5e25578df93db370
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>