Clumsily add equality checking.

programs/eq.lily

@@ -0,0 +1,6 @@
+defn main = {
+    case eq 1 1 of {
+        True -> { 326 }
+        False -> { 404 }
+    }
+}

programs/not.lily

@@ -1,4 +1,3 @@
-data Bool = { True, False }
 defn not b = {
     case b of {
         False -> { True }