lxc-clone.in: put $line in quotes to avoid its expansion

src/lxc/lxc-clone.in

@@ -271,7 +271,7 @@ while read line; do
 	if [ "${line:0:18}" = "lxc.network.hwaddr" ]; then
 		echo "lxc.network.hwaddr= 00:16:3e:$(openssl rand -hex 3| sed 's/\(..\)/\1:/g; s/.$//')"
 	else
-		echo $line
+		echo "$line"
 	fi
 done
 ) < ${c}.old > ${c}