Add remaining haskell book exercises

Haskell-book/24/language-dot/Setup.hs

@@ -0,0 +1,12 @@
+module Main where
+
+import Distribution.Simple (defaultMainWithHooks, simpleUserHooks, runTests)
+import System.Process      (system)
+
+main :: IO ()
+main =
+    defaultMainWithHooks $ simpleUserHooks { runTests = runTests' }
+  where
+    runTests' _ _ _ _ = do
+        system "runhaskell -DTEST -i./src src/test.hs"
+        return ()