feat(third_party/bazel): Check in rules_haskell from Tweag

third_party/bazel/rules_haskell/tutorial/main/Main.hs

@@ -0,0 +1,16 @@
+{-# LANGUAGE StandaloneDeriving #-}
+
+module Main where
+
+import Bool
+import qualified Prelude
+import Prelude ((++), (==), ($))
+
+deriving instance Prelude.Eq Bool
+
+bools :: [Bool]
+bools = [False, True]
+
+main =
+    Prelude.print $ Prelude.and $
+      [ not (x `and` y) == not x `or` not y | x <- bools, y <- bools]