libiscsi: add hash for license files

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/libiscsi/libiscsi.hash

@@ -1,2 +1,5 @@
 # Locally computed:
 sha256 464d104e12533dc11f0dd7662cbc2f01c132f94aa4f5bd519e3413ef485830e8  libiscsi-1.18.0.tar.gz
+sha256 88e3eccc48722b2a0eaff456dda94b8e8e123848d01f631969bec8e3c6c6eb85  COPYING
+sha256 8177f97513213526df2cf6184d8ff986c675afb514d4e68a404010521b880643  LICENCE-GPL-2.txt
+sha256 dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  LICENCE-LGPL-2.1.txt