s6-networking: add license hash

Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/s6-networking/s6-networking.hash

@@ -1,2 +1,3 @@
 # Locally generated
 sha256 d81968756abbcecde6a872c89d82f643cd621a0c295c2c57650705dbe875481a  s6-networking-2.3.0.2.tar.gz
+sha256 6ee77e7199d69b707ab864ea7a838f9562717aaa41c89413bdb2cf835f95052f  COPYING