Update submodule for performance enhancement

Cloogle @ 956cbd5d

-Subproject commit 0599859319bd62db4b389a9acef9723192a733ca
+Subproject commit 956cbd5d421b19e2b251522304b4f72c3aa2505a

backend/CloogleServer.icl

@@ -8,6 +8,7 @@ import StdList
 import StdMisc
 import StdOrdList
 import StdOverloaded
+import StdOverloadedList
 import StdString
 import StdTuple
 
@@ -238,7 +239,7 @@ handle (Just request=:{unify,name,page}) db w
 	#! drop_n = fromJust (page <|> pure 0) * MAX_RESULTS
 	#! (res,suggs,db) = searchWithSuggestions request db
 	#! suggs = if (isEmpty suggs) Nothing (Just suggs)
-	#! results = drop drop_n res
+	#! results = [r \\ r <|- Drop drop_n res]
 	#! more = max 0 (length results - MAX_RESULTS)
 	// Suggestions
 	#! (db,w) = seqSt