monitor/hmp: move hmp_snapshot_* to block-hmp-cmds.c hmp_snapshot_blkdev is from GPLv2 version of the hmp-cmds.c thus have to change the licence to GPLv2 Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20200308092440.23564-8-mlevitsk@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>