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/libraries/opendkim/default.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, fetchFromGitHub, pkg-config, libbsd, openssl, libmilter
+, autoreconfHook, perl, makeWrapper, unbound }:
+
+stdenv.mkDerivation rec {
+  pname = "opendkim";
+  version = "2.11.0-Beta2";
+
+  src = fetchFromGitHub {
+    owner = "trusteddomainproject";
+    repo = "OpenDKIM";
+    rev = "rel-opendkim-${lib.replaceChars ["."] ["-"] version}";
+    sha256 = "0nx3in8sa6xna4vfacj8g60hfzk61jpj2ldag80xzxip9c3rd2pw";
+  };
+
+  configureFlags= [
+    "--with-milter=${libmilter}"
+    "ac_cv_func_malloc_0_nonnull=yes"
+    "ac_cv_func_realloc_0_nonnull=yes"
+  ] ++ lib.optional stdenv.isDarwin "--with-unbound=${unbound}";
+
+  nativeBuildInputs = [ autoreconfHook pkg-config makeWrapper ];
+
+  buildInputs = [ libbsd openssl libmilter perl ] ++ lib.optional stdenv.isDarwin unbound;
+
+  postInstall = ''
+    wrapProgram $out/sbin/opendkim-genkey \
+      --prefix PATH : ${openssl.bin}/bin
+  '';
+
+  meta = with lib; {
+    description = "C library for producing DKIM-aware applications and an open source milter for providing DKIM service";
+    homepage = "http://www.opendkim.org/";
+    maintainers = with maintainers; [ abbradar ];
+    license = licenses.bsd3;
+    platforms = platforms.unix;
+  };
+}