atop: add hash for license file

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/atop/atop.hash

@@ -1,2 +1,5 @@
 # Locally computed:
 sha256  73e4725de0bafac8c63b032e8479e2305e3962afbe977ec1abd45f9e104eb264  atop-2.3.0.tar.gz
+
+# Hash for license file:
+sha256  204d8eff92f95aac4df6c8122bc1505f468f3a901e5a4cc08940e0ede1938994  COPYING