Update Xamarin.Auth submodule
Update Xamarin.Auth submodule

Azure/azure-mobile-apps-net-client,Azure/azure-mobile-apps-net-client,Azure/azure-mobile-apps-net-client,MatkovIvan/azure-mobile-apps-net-client,MatkovIvan/azure-mobile-apps-net-client,MatkovIvan/azure-mobile-apps-net-client