libmbus: add hash for license file

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/libmbus/libmbus.hash

@@ -1,2 +1,3 @@
 # Locally calculated
 sha256	9fca42592da0ba75df66c6f885a4dbfa916d23e65e3d1ce6e38d940d2a2719a4	libmbus-0.8.0.tar.gz
+sha256	ea171a4ae443eca7186f564db2c3cc8b84c1ac343f227f92cd52ec6a948f4a74	COPYING