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/netrw/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchurl
+, checksumType ? "built-in"
+, libmhash ? null
+, openssl ? null
+}:
+
+assert checksumType == "mhash" -> libmhash != null;
+assert checksumType == "openssl" -> openssl != null;
+
+stdenv.mkDerivation rec {
+  pname = "netrw";
+  version = "1.3.2";
+
+  configureFlags = [
+    "--with-checksum=${checksumType}"
+  ];
+
+  buildInputs = lib.optional (checksumType == "mhash") libmhash
+             ++ lib.optional (checksumType == "openssl") openssl;
+
+  src = fetchurl {
+    urls = [
+      "https://mamuti.net/files/netrw/netrw-${version}.tar.bz2"
+      "http://www.sourcefiles.org/Networking/FTP/Other/netrw-${version}.tar.bz2"
+    ];
+    sha256 = "1gnl80i5zkyj2lpnb4g0q0r5npba1x6cnafl2jb3i3pzlfz1bndr";
+  };
+
+  meta = {
+    description = "Simple tool for transporting data over the network";
+    license = lib.licenses.gpl2;
+    homepage = "https://mamuti.net/netrw/index.en.html";
+    platforms = lib.platforms.unix;
+  };
+}