Add extensions to LANGUAGE pragmas

libraries/integer-gmp/GHC/Integer.lhs

 \begin{code}
-{-# LANGUAGE BangPatterns #-}
+{-# LANGUAGE BangPatterns, CPP, MagicHash #-}
 {-# OPTIONS_GHC -XNoImplicitPrelude #-}
 {-# OPTIONS_HADDOCK hide #-}
 -----------------------------------------------------------------------------

libraries/integer-gmp/GHC/Integer/GMP/Internals.hs

-{-# LANGUAGE ForeignFunctionInterface, GHCForeignImportPrim,
+{-# LANGUAGE ForeignFunctionInterface, GHCForeignImportPrim, CPP,
              MagicHash, UnboxedTuples, UnliftedFFITypes, BangPatterns #-}
 {-# OPTIONS_GHC -XNoImplicitPrelude #-}
 {-# OPTIONS_HADDOCK hide #-}