libcap-ng: add hash for license files

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

package/libcap-ng/libcap-ng.hash

@@ -1,2 +1,4 @@
 # Locally calculated
 sha256 4a1532bcf3731aade40936f6d6a586ed5a66ca4c7455e1338d1f6c3e09221328 libcap-ng-0.7.9.tar.gz
+sha256 32b1062f7da84967e7019d01ab805935caa7ab7321a7ced0e30ebe75e5df1670 COPYING
+sha256 f18a0811fa0e220ccbc42f661545e77f0388631e209585ed582a1c693029c6aa COPYING.LIB