Make it work on Live ISOs, too

[probonopd]

Please make it work on Live ISOs, too

[BLumia]

It probably not possible to make deepin-graphics-driver-manager work on live ISO since it requires a reboot to make the system boot on overlayfs and verify if the driver can be installed on that system, and live ISO is supposed to be read-only and not be modified by any other software which include deepin-graphics-driver-manager.