update Licence

zramraid.deb/etc/zramraid/zramraid-config

@@ -2,6 +2,7 @@
 ## zramraid-config
 ## (c) author's idea and realization: Kleemov A. & Koshuba V.
 ## script author: Koshuba V - stvixfree@gmail.com
+## License: GPLv3
 ## all parameters
 ##settime=$(date +%s%3N);
 option=$1;