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/actkbd/default.nix

@@ -0,0 +1,35 @@
+{ fetchurl, lib, stdenv }:
+
+stdenv.mkDerivation rec {
+  pname = "actkbd";
+  version = "0.2.8";
+
+  src = fetchurl {
+    url = "http://users.softlab.ece.ntua.gr/~thkala/projects/actkbd/files/actkbd-${version}.tar.bz2";
+    sha256 = "1ipb7k5q7k7p54is96ij2n74jfa6xc0llb9lpjwxhsqviqxn9slm";
+  };
+
+  preConfigure = ''
+    substituteInPlace Makefile \
+      --replace /usr/local $out \
+      --replace /etc $out/etc
+  '';
+
+  postInstall = ''
+    mkdir -p $out/share/doc/actkbd
+    cp -r README samples $out/share/doc/actkbd
+  '';
+
+  meta = with lib; {
+    description = "A keyboard shortcut daemon";
+    longDescription = ''
+      actkbd is a simple daemon that binds actions to keyboard events
+      directly on evdev interface (that is, no X11 required). It
+      recognises key combinations and can handle press, repeat and
+      release events.
+    '';
+    license = licenses.gpl2;
+    homepage = "http://users.softlab.ece.ntua.gr/~thkala/projects/actkbd/";
+    platforms = platforms.linux;
+  };
+}