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/mcrcon/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "mcrcon";
+  version = "0.7.2";
+
+  src = fetchFromGitHub {
+    owner = "Tiiffi";
+    repo = "mcrcon";
+    rev = "v${version}";
+    sha256 = "sha256-cedeKsZgEyu0jqN4kBSgMJzFNUfCVXCEwH3M54miSG4=";
+  };
+
+  buildPhase = ''
+    $CC mcrcon.c -o mcrcon
+  '';
+
+  installPhase = ''
+    install -Dm 755 mcrcon $out/bin/mcrcon
+  '';
+
+  meta = {
+    homepage = "https://bukkit.org/threads/admin-rcon-mcrcon-remote-connection-client-for-minecraft-servers.70910/";
+    description = "Minecraft console client with Bukkit coloring support";
+    longDescription = ''
+      Mcrcon is a powerful Minecraft RCON terminal client with Bukkit coloring support.
+      It is well suited for remote administration and to be used as part of automated server maintenance scripts.
+      It does not trigger "IO: Broken pipe" or "IO: Connection reset" spam bugs on the server side.
+    '';
+    maintainers = with lib.maintainers; [ dermetfan ];
+    license = with lib.licenses; [ zlib libpng ];
+  };
+}