Merge pull request #852 from sinelaw/patch-3

Add some packages (which I use but don't maintain)

build-constraints.yaml

@@ -1016,6 +1016,12 @@ packages:
         - xml-to-json
         - xml-to-json-fast
         - digits
+        - unification-fd
+        - logict
+        - resolve-trivial-conflicts
+        - wl-pprint
+        - leveldb-haskell
+        - system-argv0
 
     "Mateusz Kowalczyk <fuuzetsu@fuuzetsu.co.uk> @Fuuzetsu":
         - aeson-schema