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/opendht/default.nix

@@ -0,0 +1,71 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, Security
+, cmake
+, pkg-config
+, asio
+, nettle
+, gnutls
+, msgpack
+, readline
+, libargon2
+, jsoncpp
+, restinio
+, http-parser
+, openssl
+, fmt
+, enableProxyServerAndClient ? false
+, enablePushNotifications ? false
+}:
+
+stdenv.mkDerivation rec {
+  pname = "opendht";
+  version = "2.4.0";
+
+  src = fetchFromGitHub {
+    owner = "savoirfairelinux";
+    repo = "opendht";
+    rev = version;
+    sha256 = "sha256-vfMzUzTfz8G+E4W/1pX5v2P0RntgSTR61urmxtsrOWM=";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    asio
+    nettle
+    gnutls
+    msgpack
+    readline
+    libargon2
+  ] ++ lib.optionals enableProxyServerAndClient [
+    jsoncpp
+    restinio
+    http-parser
+    openssl
+    fmt
+  ] ++ lib.optionals stdenv.isDarwin [
+    Security
+  ];
+
+  cmakeFlags = lib.optionals enableProxyServerAndClient [
+    "-DOPENDHT_PROXY_SERVER=ON"
+    "-DOPENDHT_PROXY_CLIENT=ON"
+  ] ++ lib.optionals enablePushNotifications [
+    "-DOPENDHT_PUSH_NOTIFICATIONS=ON"
+  ];
+
+  outputs = [ "out" "lib" "dev" "man" ];
+
+  meta = with lib; {
+    description = "A C++11 Kademlia distributed hash table implementation";
+    homepage = "https://github.com/savoirfairelinux/opendht";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ taeer olynch thoughtpolice ];
+    platforms = platforms.unix;
+  };
+}