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/system/journalwatch/default.nix

@@ -0,0 +1,39 @@
+{ lib, buildPythonPackage, fetchFromGitHub, pythonOlder, systemd, pytest }:
+
+buildPythonPackage rec {
+  pname = "journalwatch";
+  version = "1.1.0";
+  disabled = pythonOlder "3.3";
+
+  src = fetchFromGitHub {
+    owner = "The-Compiler";
+    repo = pname;
+    rev = "v${version}";
+    sha512 = "11g2f1w9lfqw6zxxyg7qrqpb914s6w71j0gnpw7qr7cak2l5jlf2l39dlg30y55rw7jgmf0yg77wwzd0c430mq1n6q1v8w86g1rwkzb";
+  };
+
+  # can be removed post 1.1.0
+  postPatch = ''
+    substituteInPlace test_journalwatch.py \
+      --replace "U Thu Jan  1 00:00:00 1970 prio foo [1337]" "U Thu Jan  1 00:00:00 1970 pprio foo [1337]"
+  '';
+
+
+  doCheck = true;
+  checkInputs = [ pytest ];
+  checkPhase = ''
+    pytest
+  '';
+
+  propagatedBuildInputs = [
+    systemd
+  ];
+
+
+  meta = with lib; {
+    description = "journalwatch is a tool to find error messages in the systemd journal.";
+    homepage = "https://github.com/The-Compiler/journalwatch";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [ florianjacob ];
+  };
+}