libical: add hash for license file

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

package/libical/libical.hash

@@ -1,2 +1,3 @@
 # Locally computed:
 sha256	089ce3c42d97fbd7a5d4b3c70adbdd82115dd306349c1f5c46a8fb3f8c949592	libical-1.0.1.tar.gz
+sha256	c393726f82e6f21df5262110215f6a4382b32046d10afdcfcc49338aa7a191f2	LICENSE