Remove warnings in test files.

Author: cristianoc

analysis/tests/src/TableclothMap.ml

@@ -1,11 +1,11 @@
 let add = 3
 
 module Of (M : sig end) = struct
-  type t = int
+  type _t = int
 end
 
 module M = struct end
 
 module Int = struct
-  type t = Of(M).t
+  type _t = Of(M)._t
 end

analysis/tests/src/TableclothMap.mli

@@ -1 +1,3 @@
 val add : int
+
+module Int : sig end