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/ratman/default.nix

@@ -0,0 +1,41 @@
+{ lib
+, fetchurl
+, installShellFiles
+, libsodium
+, pkg-config
+, protobuf
+, rustPlatform
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "ratman";
+  version = "0.3.1";
+
+  src = fetchurl {
+    url = "https://git.irde.st/we/irdest/-/archive/${pname}-${version}/irdest-${pname}-${version}.tar.gz";
+    sha256 = "0x1wvhsmf7m55j9hmirkz75qivsg33xab1sil6nbv8fby428fpq6";
+  };
+
+  cargoSha256 = "1dkfyy1z34qaavyd3f20hrrrb3kjsdfkyzd535xlds9wivgchmd0";
+
+  nativeBuildInputs = [ protobuf pkg-config installShellFiles ];
+
+  cargoBuildFlags = [ "--all-features" "-p" "ratman" ];
+  cargoTestFlags = cargoBuildFlags;
+
+  buildInputs = [ libsodium ];
+
+  postInstall = ''
+    installManPage docs/man/ratmand.1
+  '';
+
+  SODIUM_USE_PKG_CONFIG = 1;
+
+  meta = with lib; {
+    description = "A modular decentralised peer-to-peer packet router and associated tools";
+    homepage = "https://git.irde.st/we/irdest";
+    platforms = platforms.unix;
+    license = licenses.agpl3;
+    maintainers = with maintainers; [ spacekookie yuka ];
+  };
+}