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/applications/networking/dsvpn/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  pname = "dsvpn";
+  version = "0.1.4";
+
+  src = fetchFromGitHub {
+    owner = "jedisct1";
+    repo = pname;
+    rev = version;
+    sha256 = "1gbj3slwmq990qxsbsaxasi98alnnzv3adp6f8w8sxd4gi6qxhdh";
+  };
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm755 -t $out/bin dsvpn
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "A Dead Simple VPN";
+    homepage = "https://github.com/jedisct1/dsvpn";
+    license = licenses.mit;
+    maintainers = [ maintainers.marsam ];
+    platforms = platforms.unix;
+  };
+}