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/X11/xprintidle-ng/default.nix

@@ -0,0 +1,67 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, libX11
+, libXScrnSaver
+, libXext
+, gnulib
+, autoconf
+, automake
+, libtool
+, gettext
+, pkg-config
+, git
+, perl
+, texinfo
+, help2man
+}:
+
+stdenv.mkDerivation rec {
+  pname = "xprintidle-ng";
+  version = "unstable-2015-09-01";
+
+  src = fetchFromGitHub {
+    owner = "taktoa";
+    repo = pname;
+    rev = "9083ba284d9222541ce7da8dc87d5a27ef5cc592";
+    sha256 = "0a5024vimpfrpj6w60j1ad8qvjkrmxiy8w1yijxfwk917ag9rkpq";
+  };
+
+  postPatch = ''
+    substituteInPlace configure.ac \
+      --replace "AC_PREREQ([2.62])" "AC_PREREQ([2.64])"
+  '';
+
+  nativeBuildInputs = [
+    autoconf
+    automake
+    gettext
+    git
+    gnulib
+    help2man
+    libtool
+    perl
+    pkg-config
+    texinfo
+  ];
+
+  configurePhase = ''
+    ./bootstrap --gnulib-srcdir=${gnulib}
+    ./configure --prefix="$out"
+  '';
+
+  buildInputs = [
+    libX11
+    libXScrnSaver
+    libXext
+  ];
+
+  meta = {
+    inherit version;
+    description = "A command-line tool to print idle time from libXss";
+    homepage = "http://taktoa.me/xprintidle-ng/";
+    license = lib.licenses.gpl2;
+    maintainers = [ lib.maintainers.raskin ];
+    platforms = lib.platforms.linux;
+  };
+}