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/illum/default.nix

@@ -0,0 +1,42 @@
+{ lib, stdenv, fetchFromGitHub, fetchpatch, pkg-config, ninja, libevdev, libev, udev }:
+
+stdenv.mkDerivation rec {
+  pname = "illum";
+  version = "0.5";
+
+  src = fetchFromGitHub {
+    owner = "jmesmon";
+    repo = "illum";
+    rev = "v${version}";
+    sha256 = "S4lUBeRnZlRUpIxFdN/bh979xvdS7roF6/6Dk0ZUrnM=";
+    fetchSubmodules = true;
+  };
+
+  patches = [
+    (fetchpatch {
+      name = "prevent-unplug-segfault"; # See https://github.com/jmesmon/illum/issues/19
+      url = "https://github.com/jmesmon/illum/commit/47b7cd60ee892379e5d854f79db343a54ae5a3cc.patch";
+      sha256 = "sha256-hIBBCIJXAt8wnZuyKye1RiEfOCelP3+4kcGrM43vFOE=";
+    })
+  ];
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ ninja libevdev libev udev ];
+
+  configurePhase = ''
+    bash ./configure
+  '';
+
+  installPhase = ''
+    mkdir -p $out/bin
+    mv illum-d $out/bin
+  '';
+
+  meta = {
+    homepage = "https://github.com/jmesmon/illum";
+    description = "Daemon that wires button presses to screen backlight level";
+    platforms = lib.platforms.linux;
+    maintainers = [ lib.maintainers.dancek ];
+    license = lib.licenses.agpl3;
+  };
+}