ghc: autoreconfHook

This is required to apply patches that modify configure.ac and
friends, but given we're already including most of it as inputs
anyway, we might as well just always do it and get the additional
benefit of knowing that the generated code corresponds to the source.

pkgs/development/compilers/ghc/common-hadrian.nix

@@ -22,14 +22,12 @@
 
   # build-tools
   bootPkgs,
-  autoconf,
-  automake,
+  autoreconfHook,
   coreutils,
   fetchurl,
   fetchgit,
   perl,
   python3,
-  m4,
   sphinx,
   xattr,
   autoSignDarwinBinariesHook,
@@ -614,15 +612,12 @@ stdenv.mkDerivation (
 
     nativeBuildInputs =
       [
+        autoreconfHook
         perl
         hadrian
         bootPkgs.alex
         bootPkgs.happy
         bootPkgs.hscolour
-        # autoconf and friends are necessary for hadrian to create the bindist
-        autoconf
-        automake
-        m4
         # Python is used in a few scripts invoked by hadrian to generate e.g. rts headers.
         python3
         # Tool used to update GHC's settings file in postInstall