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/cluster/gatekeeper/default.nix

@@ -0,0 +1,39 @@
+{ lib
+, buildGoModule
+, fetchFromGitHub
+, installShellFiles
+}:
+
+buildGoModule rec {
+  pname = "gatekeeper";
+  version = "3.8.1";
+
+  src = fetchFromGitHub {
+    owner = "open-policy-agent";
+    repo = "gatekeeper";
+    rev = "v${version}";
+    sha256 = "sha256-zEUH88sjgR738BXK2oSSM6jf5oHZt0VJv61BcxclG1Q=";
+  };
+
+  vendorSha256 = null;
+
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
+  subPackages = [ "cmd/gator" ];
+
+  postInstall = ''
+    installShellCompletion --cmd gator \
+      --bash <($out/bin/gator completion bash) \
+      --fish <($out/bin/gator completion fish) \
+      --zsh <($out/bin/gator completion zsh)
+  '';
+
+  meta = with lib; {
+    description = "Policy Controller for Kubernetes";
+    homepage = "https://github.com/open-policy-agent/gatekeeper";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ SuperSandro2000 ];
+  };
+}