package/putty: fix legal info

Commit bf284bcfbaa7f031713afcc4c4e33d54724b6f57 forgot to update hash of
license file (year updated)

Fixes:
 - http://autobuild.buildroot.org/results/900b3fe8d4bf029c6bca6ca63c6e093e42cc1072

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

package/putty/putty.hash

@@ -4,4 +4,4 @@ sha256  428cc8666fbb938ebf4ac9276341980dcd70de395b33164496cf7995ef0ef0d8  putty-
 sha512  4f10f870b229c89e928921d3b350955ce1c1170a062e7943d9cc8dbd83389d82a9b844623541605f0db5a429d545c2d188bf8e384c6515466fae69b216120983  putty-0.79.tar.gz
 
 # Locally calculated
-sha256  7b10c93f0d582e820a9e6f8c6abbcff54192e41e60644f4d09b96b14fdbc74f8  LICENCE
+sha256  7ede37f344ee03436c155a375ecb6cdb42a77105baa6e7804bf43260dc4a0c54  LICENCE