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/uptimed/default.nix

@@ -0,0 +1,35 @@
+{ lib, stdenv, fetchFromGitHub, autoreconfHook }:
+
+stdenv.mkDerivation rec {
+  pname = "uptimed";
+  version = "0.4.6";
+
+  src = fetchFromGitHub {
+    sha256 = "sha256-aYP20O/8QotmnpryiFnFAfrpyk5f+0OkbkGxWf2Ug9w=";
+    rev = "v${version}";
+    repo = "uptimed";
+    owner = "rpodgorny";
+  };
+
+  nativeBuildInputs = [ autoreconfHook ];
+  patches = [ ./no-var-spool-install.patch ];
+
+  postPatch = ''
+    substituteInPlace libuptimed/urec.h \
+      --replace /var/spool /var/lib
+  '';
+
+  meta = with lib; {
+    description = "Uptime record daemon";
+    longDescription = ''
+      An uptime record daemon keeping track of the highest uptimes a computer
+      system ever had. It uses the system boot time to keep sessions apart from
+      each other. Uptimed comes with a console front-end to parse the records,
+      which can also easily be used to show your records on a web page.
+    '';
+    homepage = "https://github.com/rpodgorny/uptimed/";
+    license = with licenses; [ gpl2Only lgpl21Plus ];
+    maintainers = with maintainers; [ ];
+    platforms = platforms.linux;
+  };
+}