ubus: add hash

ubus had a hash file, but is says "none" because it is a git download.
Since our git downloads are not reproducible, we can actually add a
hash.

Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/ubus/ubus.hash

@@ -1,2 +1,2 @@
-# No hash for this git snapshot
-none  xxx  ubus-259450f414d8c9ee41896e8e6d6bc57ec00e2b63.tar.gz
+# Locally calculated
+sha256  0dbf75c2103f3f567b9bf1bb719ea9776d18401bbf2dfd8bed2c2ebbdd1021da  ubus-259450f414d8c9ee41896e8e6d6bc57ec00e2b63.tar.gz