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/misc/topicctl/default.nix

@@ -0,0 +1,31 @@
+{ lib, buildGoModule, fetchFromGitHub }:
+
+buildGoModule rec {
+  pname = "topicctl";
+  version = "1.3.1";
+
+  src = fetchFromGitHub {
+    owner = "segmentio";
+    repo = "topicctl";
+    rev = "v${version}";
+    sha256 = "sha256-hbsVk82iTZGVvypZHhUk/By0sSQxmZQBog2/3qKE94s=";
+  };
+
+  vendorSha256 = "sha256-i1ir/aT/jaK//rmH9k/eK4LIRh0OmEytc0mGO7IrpqI=";
+
+  ldflags = [
+    "-X main.BuildVersion=${version}"
+    "-X main.BuildCommitSha=unknown"
+    "-X main.BuildDate=unknown"
+  ];
+
+  # needs a kafka server
+  doCheck = false;
+
+  meta = with lib; {
+    description = "A tool for easy, declarative management of Kafka topics";
+    inherit (src.meta) homepage;
+    license = licenses.mit;
+    maintainers = with maintainers; [ eskytthe srhb ];
+  };
+}