Function gio_sys::g_dbus_connection_new

pub unsafe extern fn g_dbus_connection_new(stream: *mut GIOStream,
                                           guid: *const c_char,
                                           flags: GDBusConnectionFlags,
                                           observer: *mut GDBusAuthObserver,
                                           cancellable: *mut GCancellable,
                                           callback: GAsyncReadyCallback,
                                           user_data: gpointer)