File _servicedata of Package stardust-xr-flatland

<servicedata>
<service name="tar_scm">
                <param name="url">https://github.com/StardustXR/flatland.git</param>
              <param name="changesrevision">63e060a7899f4113ec6f19510656a0fc1d6940b8</param></service></servicedata>