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/security/zkar/default.nix

@@ -0,0 +1,25 @@
+{ lib
+, buildGoModule
+, fetchFromGitHub
+}:
+
+buildGoModule rec {
+  pname = "zkar";
+  version = "1.3.0";
+
+  src = fetchFromGitHub {
+    owner = "phith0n";
+    repo = pname;
+    rev = "v${version}";
+    hash = "sha256-TGqsiYZLbXvCc30OtvNbX4INlzw3ZfjvXal47rP7NDw=";
+  };
+
+  vendorSha256 = "sha256-HQ9qclaaDj0H8PL0oQG1WsH19wVQpynijHNcal4gWBE=";
+
+  meta = with lib; {
+    description = "Java serialization protocol analysis tool";
+    homepage = "https://github.com/phith0n/zkar";
+    license = licenses.asl20;
+    maintainers = with maintainers; [ fab ];
+  };
+}