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/development/tools/convco/default.nix

@@ -0,0 +1,35 @@
+{ stdenv
+, lib
+, rustPlatform
+, fetchFromGitHub
+, cmake
+, libiconv
+, openssl
+, pkg-config
+, Security
+}:
+
+rustPlatform.buildRustPackage rec {
+  pname = "convco";
+  version = "0.3.10";
+
+  src = fetchFromGitHub {
+    owner = "convco";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-Jr1rNxVguASl6fPfGNx2/MDlMC+KokgQyzhBnvqnwFs=";
+  };
+
+  cargoSha256 = "sha256-mStoWH/SusAcbAR3MeBWaY21TdJZJcKm1VxmA3zmlTw=";
+
+  nativeBuildInputs = [ cmake pkg-config ];
+
+  buildInputs = [ openssl ] ++ lib.optionals stdenv.isDarwin [ libiconv Security ];
+
+  meta = with lib; {
+    description = "A Conventional commit cli";
+    homepage = "https://github.com/convco/convco";
+    license = with licenses; [ mit ];
+    maintainers = with maintainers; [ hoverbear ];
+  };
+}