qemu security update

15:4.2.1-24.el7 - Revert 'virtio-scsi: Send 'REPORTED LUNS CHANGED' sense data upon disk hotplug events' Mark Kanda Orabug: 34905939 15:4.2.1-23.el7 - hw/display/ati2d: Fix buffer overflow in ati2dblt CVE-2021-3638 Philippe Mathieu-Daude Orabug: 33930374 CVE-2021-3638 - tests/acpi: virt: update...