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/tools/networking/smartdns/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub, openssl, testers, smartdns }:
+
+stdenv.mkDerivation rec {
+  pname = "smartdns";
+  version = "36.1";
+
+  src = fetchFromGitHub {
+    owner = "pymumu";
+    repo = pname;
+    rev = "Release${version}";
+    sha256 = "sha256-5pAt7IjgbCCGaHeSoQvuoc6KPD9Yn5iXL1CAawgBeY0=";
+  };
+
+  buildInputs = [ openssl ];
+
+  makeFlags = [
+    "PREFIX=${placeholder "out"}"
+    "SYSTEMDSYSTEMUNITDIR=${placeholder "out"}/lib/systemd/system"
+    "RUNSTATEDIR=/run"
+    # by default it is the build time... weird... https://github.com/pymumu/smartdns/search?q=ver
+    "VER=${version}"
+  ];
+
+  installFlags = [ "SYSCONFDIR=${placeholder "out"}/etc" ];
+
+  passthru.tests = {
+    version = testers.testVersion { package = smartdns; };
+  };
+
+  meta = with lib; {
+    description =
+      "A local DNS server to obtain the fastest website IP for the best Internet experience";
+    longDescription = ''
+      SmartDNS is a local DNS server. SmartDNS accepts DNS query requests from local clients, obtains DNS query results from multiple upstream DNS servers, and returns the fastest access results to clients.
+      Avoiding DNS pollution and improving network access speed, supports high-performance ad filtering.
+      Unlike dnsmasq's all-servers, smartdns returns the fastest access resolution.
+    '';
+    homepage = "https://github.com/pymumu/smartdns";
+    maintainers = [ maintainers.lexuge ];
+    license = licenses.gpl3Plus;
+    platforms = platforms.linux;
+  };
+}