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/qrcp/default.nix

@@ -0,0 +1,45 @@
+{ lib
+, buildGoModule
+, fetchFromGitHub
+, installShellFiles
+}:
+
+buildGoModule rec {
+  pname = "qrcp";
+  version = "0.9.1";
+
+  src = fetchFromGitHub {
+    owner = "claudiodangelis";
+    repo = "qrcp";
+    rev = version;
+    sha256 = "sha256-oXtFkjCnbfjV15XWkmmJmhG82GyaY4FAcF5NrGnxHm0=";
+  };
+
+  vendorSha256 = "1hn8c72fvih6ws1y2c4963pww3ld64m0yh3pmx62hwcy83bhb0v4";
+
+  subPackages = [ "." ];
+
+  nativeBuildInputs = [
+    installShellFiles
+  ];
+
+  postInstall = ''
+    installShellCompletion --cmd qrcp \
+      --bash <($out/bin/qrcp completion bash) \
+      --fish <($out/bin/qrcp completion fish) \
+      --zsh <($out/bin/qrcp completion zsh)
+  '';
+
+  meta = with lib; {
+    homepage = "https://claudiodangelis.com/qrcp/";
+    description = "Transfer files over wifi by scanning a QR code from your terminal";
+    longDescription = ''
+      qrcp binds a web server to the address of your Wi-Fi network
+      interface on a random port and creates a handler for it. The default
+      handler serves the content and exits the program when the transfer is
+      complete.
+    '';
+    license = licenses.mit;
+    maintainers = with maintainers; [ fgaz SuperSandro2000 ];
+  };
+}