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/guardian-agent/default.nix

@@ -0,0 +1,45 @@
+{ buildGoPackage
+, fetchFromGitHub
+, lib
+, autossh
+, makeWrapper
+}:
+
+buildGoPackage rec {
+  pname = "guardian-agent";
+  version = "0.7.2";
+
+  src = fetchFromGitHub {
+    owner = "StanfordSNR";
+    repo = pname;
+    rev = "v${version}-beta";
+    sha256 = "05269y944hcabn6dqa66387rdhx81vcqcyjv6m1hdbz5ba8j7mqn";
+  };
+
+  nativeBuildInputs = [ makeWrapper ];
+
+  goPackagePath = "github.com/StanfordSNR/guardian-agent";
+
+  deleteVendor = true;
+  goDeps = ./deps.nix;
+
+  postInstall = ''
+    mkdir -p $out/bin $out/share/doc/${pname}
+    cp -v ./go/src/github.com/StanfordSNR/${pname}/scripts/* $out/bin/
+    cp -vr ./go/src/github.com/StanfordSNR/${pname}/{AUTHORS,doc,LICENSE,README.md} $out/share/doc/guardian-agent
+  '';
+
+  postFixup = ''
+    wrapProgram $out/bin/sga-guard \
+      --prefix PATH : "$out/bin" \
+      --prefix PATH : "${autossh}/bin"
+  '';
+
+  meta = with lib; {
+    description = "Secure ssh-agent forwarding for Mosh and SSH";
+    homepage = "https://github.com/StanfordSNR/guardian-agent";
+    license = licenses.bsd3;
+    maintainers = with maintainers; [ mmahut ];
+    platforms = platforms.unix;
+  };
+}