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Add qemu 4.2 and libvirt 6.0 patch (openstack wallaby)
Small fix due to the new functionality in cinder "Skip sparse copy during volume reimage" https://opendev.org/openstack/cinder/commit/8d7e292bcd9ae610ac6341de2d00b8990252c24c
Fix: #4 Fix patch to use "git am".
Format patches for allow use "git am"