dhallPackages: add recurseIntoAttrs

dhallPackages were not built by the hydra, because the
`recurseIntoAttrs` calls was missing (all other package sets use it to
make hydra build the packages).

pkgs/top-level/all-packages.nix

@@ -11258,7 +11258,7 @@ in
 
   dhall-text = haskell.lib.justStaticExecutables haskellPackages.dhall-text;
 
-  dhallPackages = callPackage ./dhall-packages.nix { };
+  dhallPackages = recurseIntoAttrs (callPackage ./dhall-packages.nix { });
 
   duktape = callPackage ../development/interpreters/duktape { };