qemu: Escape snapshot name passed to {save,load,del}vm (cherry picked from commit 81711cee34740b5896e7de0a4d1695ce97b543dc)
qemu: Escape snapshot name passed to {save,load,del}vm
(cherry picked from commit 81711cee34740b5896e7de0a4d1695ce97b543dc)

Signed-off-by: Steve Hodgson <eb20a6615749cf04ff61aa37e18f749ed6d01446@solarflare.com>

sshah-solarflare/Libvirt-PCI-passthrough-,sshah-solarflare/Libvirt-PCI-passthrough-,sshah-solarflare/Libvirt-PCI-passthrough-,sshah-solarflare/Libvirt-PCI-passthrough-,sshah-solarflare/Libvirt-PCI-passthrough-