Added kind signatures in boot files

Author: mmhat

dhall/src/Dhall/Syntax/Chunks.hs-boot

@@ -1,3 +1,8 @@
+{-# LANGUAGE StandaloneKindSignatures #-}
+
 module Dhall.Syntax.Chunks where
 
+import Data.Kind (Type)
+
+type Chunks :: Type -> Type -> Type
 data Chunks s a

dhall/src/Dhall/Syntax/Types.hs-boot

@@ -1,9 +1,14 @@
+{-# LANGUAGE StandaloneKindSignatures #-}
+
 module Dhall.Syntax.Types where
 
+import Data.Kind (Type)
+
 data DhallDouble
 
 data PreferAnnotation
 
+type FieldSelection :: Type -> Type
 data FieldSelection s
 
 data WithComponent