Add missed test (uuugh)

Signed-off-by: Austin Seipp <austin@well-typed.com>
(cherry picked from commit 34ba68c2)

testsuite/tests/typecheck/should_fail/T9999.hs

+{-# LANGUAGE AutoDeriveTypeable, PolyKinds, TypeFamilies, StandaloneDeriving #-}
+
+module T9999 where
+
+import Data.Typeable
+
+data family F a
+
+class C a where
+  data F1 a
+  type F2 a
+
+main = typeRep (Proxy :: Proxy F) == typeRep (Proxy :: Proxy F1)

testsuite/tests/typecheck/should_fail/T9999.stderr

+
+T9999.hs:13:38:
+    No instance for (Typeable F1)
+      (maybe you haven't applied enough arguments to a function?)
+      arising from a use of ‘typeRep’
+    In the second argument of ‘(==)’, namely
+      ‘typeRep (Proxy :: Proxy F1)’
+    In the expression:
+      typeRep (Proxy :: Proxy F) == typeRep (Proxy :: Proxy F1)
+    In an equation for ‘main’:
+        main = typeRep (Proxy :: Proxy F) == typeRep (Proxy :: Proxy F1)