qvm-copy-to-vm: use --service option

qvm-run got --service option, so use it. Old method doesn't work
anymore, because qubes.VMShell service is used, instead of qrexec
command directly.

file-copy-vm/qvm-copy-to-vm

@@ -36,7 +36,7 @@ mkfifo -- "$RESPONSE"
 
 # can't use $@ with --localcmd, and $* would fail on whitespace
 /usr/lib/qubes/qfile-dom0-agent "$@" <"$RESPONSE" |
-qvm-run --pass-io "$VM" "QUBESRPC qubes.Filecopy dom0" >"$RESPONSE"
+qvm-run --pass-io --service "$VM" "qubes.Filecopy" >"$RESPONSE"
 
 if [ "${0##*/}" = "qvm-move-to-vm" ]; then
 	rm -rf -- "$@"