uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/tools/haskell/dconf2nix/default.nix

@@ -0,0 +1,32 @@
+{ haskell, haskellPackages, lib, runCommand }:
+
+let
+  dconf2nix =
+    haskell.lib.compose.justStaticExecutables
+      (haskell.lib.compose.overrideCabal (oldAttrs: {
+        maintainers = (oldAttrs.maintainers or []) ++ [
+          lib.maintainers.gvolpe
+        ];
+      }) haskellPackages.dconf2nix);
+in
+
+dconf2nix.overrideAttrs (oldAttrs: {
+  passthru = (oldAttrs.passthru or {}) // {
+    updateScript = ./update.sh;
+
+    # These tests can be run with the following command.
+    #
+    # $ nix-build -A dconf2nix.passthru.tests
+    tests =
+      runCommand
+        "dconf2nix-tests"
+        {
+          nativeBuildInputs = [
+            dconf2nix
+          ];
+        }
+        ''
+          dconf2nix > $out
+        '';
+  };
+})