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/servers/softether/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchurl
+, openssl, readline, ncurses, zlib
+, dataDir ? "/var/lib/softether" }:
+
+stdenv.mkDerivation rec {
+  pname = "softether";
+  version = "4.38";
+  build = "9760";
+
+  src = fetchurl {
+    url = "https://github.com/SoftEtherVPN/SoftEtherVPN_Stable/releases/download/v${version}-${build}-rtm/softether-src-v${version}-${build}-rtm.tar.gz";
+    sha256 = "0d8zahi9lkv72jh8yj66pwrsi4451vk113d3khzrzgbic6s2i0g6";
+  };
+
+  buildInputs = [ openssl readline ncurses zlib ];
+
+  preConfigure = ''
+    ./configure
+  '';
+
+  buildPhase = ''
+    mkdir -p $out/bin
+    sed -i \
+      -e "/INSTALL_BINDIR=/s|/usr/bin|/bin|g" \
+      -e "/_DIR=/s|/usr|${dataDir}|g" \
+      -e "s|\$(INSTALL|$out/\$(INSTALL|g" \
+      -e "/echo/s|echo $out/|echo |g" \
+      Makefile
+  '';
+
+  meta = with lib; {
+    description = "An Open-Source Free Cross-platform Multi-protocol VPN Program";
+    homepage = "https://www.softether.org/";
+    license = licenses.asl20;
+    maintainers = [ maintainers.rick68 ];
+    platforms = [ "x86_64-linux" ];
+  };
+}