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/development/tools/misc/tockloader/default.nix

@@ -0,0 +1,37 @@
+{ lib
+, python3Packages
+}:
+
+python3Packages.buildPythonApplication rec {
+  pname = "tockloader";
+  version = "1.6.0";
+
+  src = python3Packages.fetchPypi {
+    inherit pname version;
+    sha256 = "1aqkj1nplcw3gmklrhq6vxy6v9ad5mqiw4y1svasak2zkqdk1wyc";
+  };
+
+  propagatedBuildInputs = with python3Packages; [
+    argcomplete
+    colorama
+    crcmod
+    pyserial
+    pytoml
+    tqdm
+  ];
+
+  # has no test suite
+  checkPhase = ''
+    runHook preCheck
+    $out/bin/tockloader --version | grep -q ${version}
+    runHook postCheck
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/tock/tockloader";
+    license = licenses.mit;
+    description = "Tool for programming Tock onto hardware boards";
+    maintainers = with maintainers; [ ];
+  };
+}
+