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/hound.nix

@@ -0,0 +1,59 @@
+# Test whether `houndd` indexes nixpkgs
+import ./make-test-python.nix ({ pkgs, ... } : {
+  name = "hound";
+  meta = with pkgs.lib.maintainers; {
+    maintainers = [ grahamc ];
+  };
+  nodes.machine = { pkgs, ... }: {
+    services.hound = {
+      enable = true;
+      config = ''
+        {
+          "max-concurrent-indexers": 1,
+          "dbpath": "/var/lib/hound/data",
+          "repos": {
+            "nix": {
+              "url": "file:///var/lib/hound/my-git"
+            }
+          }
+        }
+      '';
+    };
+
+    systemd.services.houndseed = {
+      description = "seed hound with a git repo";
+      requiredBy = [ "hound.service" ];
+      before = [ "hound.service" ];
+
+      serviceConfig = {
+        User = "hound";
+        Group = "hound";
+        WorkingDirectory = "/var/lib/hound";
+      };
+      path = [ pkgs.git ];
+      script = ''
+        git config --global user.email "you@example.com"
+        git config --global user.name "Your Name"
+        git init my-git --bare
+        git init my-git-clone
+        cd my-git-clone
+        echo 'hi nix!' > hello
+        git add hello
+        git commit -m "hello there :)"
+        git remote add origin /var/lib/hound/my-git
+        git push origin master
+      '';
+    };
+  };
+
+  testScript = ''
+    start_all()
+
+    machine.wait_for_unit("network.target")
+    machine.wait_for_unit("hound.service")
+    machine.wait_for_open_port(6080)
+    machine.wait_until_succeeds(
+        "curl -f http://127.0.0.1:6080/api/v1/search\?stats\=fosho\&repos\=\*\&rng=%3A20\&q\=hi\&files\=\&i=nope | grep 'Filename' | grep 'hello'"
+    )
+  '';
+})