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>

nixos/tests/minio.nix

@@ -0,0 +1,58 @@
+import ./make-test-python.nix ({ pkgs, ...} :
+let
+    accessKey = "BKIKJAA5BMMU2RHO6IBB";
+    secretKey = "V7f1CwQqAcwo80UEIJEjc5gVQUSSx5ohQ9GSrr12";
+    minioPythonScript = pkgs.writeScript "minio-test.py" ''
+      #! ${pkgs.python3.withPackages(ps: [ ps.minio ])}/bin/python
+      import io
+      import os
+      from minio import Minio
+      minioClient = Minio('localhost:9000',
+                    access_key='${accessKey}',
+                    secret_key='${secretKey}',
+                    secure=False)
+      sio = io.BytesIO()
+      sio.write(b'Test from Python')
+      sio.seek(0, os.SEEK_END)
+      sio_len = sio.tell()
+      sio.seek(0)
+      minioClient.put_object('test-bucket', 'test.txt', sio, sio_len, content_type='text/plain')
+    '';
+in {
+  name = "minio";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ bachp ];
+  };
+
+  nodes = {
+    machine = { pkgs, ... }: {
+      services.minio = {
+        enable = true;
+        rootCredentialsFile = pkgs.writeText "minio-credentials" ''
+          MINIO_ROOT_USER=${accessKey}
+          MINIO_ROOT_PASSWORD=${secretKey}
+        '';
+      };
+      environment.systemPackages = [ pkgs.minio-client ];
+
+      # Minio requires at least 1GiB of free disk space to run.
+      virtualisation.diskSize = 4 * 1024;
+    };
+  };
+
+  testScript = ''
+    start_all()
+    machine.wait_for_unit("minio.service")
+    machine.wait_for_open_port(9000)
+
+    # Create a test bucket on the server
+    machine.succeed(
+        "mc config host add minio http://localhost:9000 ${accessKey} ${secretKey} --api s3v4"
+    )
+    machine.succeed("mc mb minio/test-bucket")
+    machine.succeed("${minioPythonScript}")
+    assert "test-bucket" in machine.succeed("mc ls minio")
+    assert "Test from Python" in machine.succeed("mc cat minio/test-bucket/test.txt")
+    machine.shutdown()
+  '';
+})