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/rtrtr/default.nix

@@ -0,0 +1,42 @@
+{ lib
+, rustPlatform
+, fetchFromGitHub
+, pkg-config
+, stdenv
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "rtrtr";
+  version = "0.1.2";
+
+  src = fetchFromGitHub {
+    owner = "NLnetLabs";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-8wcmciQ2OcvMNl6gADte40jrP+VfhoKn95ofjyjtRIo=";
+  };
+
+  cargoSha256 = "sha256-Jdu5U56Duqzakvj3rldzch17y1nhJmuxwJtq4Ydx3IY=";
+
+  buildInputs = lib.optional stdenv.isDarwin Security;
+  nativeBuildInputs = [ pkg-config ];
+
+  buildNoDefaultFeatures = true;
+
+  meta = with lib; {
+    description = "RPKI data proxy";
+    longDescription = ''
+      TRTR is an RPKI data proxy, designed to collect Validated ROA Payloads
+      from one or more sources in multiple formats and dispatch it onwards. It
+      provides the means to implement multiple distribution architectures for RPKI
+      such as centralised RPKI validators that dispatch data to local caching RTR
+      servers. RTRTR can read RPKI data from multiple RPKI Relying Party packages via
+      RTR and JSON and, in turn, provide an RTR service for routers to connect to.
+    '';
+    homepage = "https://github.com/NLnetLabs/rtrtr";
+    changelog = "https://github.com/NLnetLabs/rtrtr/blob/v${version}/Changelog.md";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ steamwalker ];
+  };
+}