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/misc/fileschanged/default.nix

@@ -0,0 +1,33 @@
+{ lib, stdenv, fetchurl, gamin }:
+
+stdenv.mkDerivation rec {
+  pname = "fileschanged";
+  version = "0.6.9";
+
+  src = fetchurl {
+    url = "mirror://savannah/fileschanged/fileschanged-${version}.tar.gz";
+    sha256 = "0ajc9h023vzpnlqqjli4wbvs0q36nr5p9msc3wzbic8rk687qcxc";
+  };
+
+  buildInputs = [ gamin ];
+
+  patches = [./unused-variables.debian.patch];
+
+  doCheck = true;
+
+  meta = {
+    homepage = "https://www.nongnu.org/fileschanged/";
+    description = "A command-line utility that reports when files have been altered";
+    license = lib.licenses.gpl3Plus;
+
+    longDescription = ''
+      This utility is a client to FAM (File Alteration Monitor) servers
+      like FAM or Gamin. You give it some filenames on the command line
+      and then it monitors those files for changes. When it discovers
+      that a file has been altered, it displays the filename on the
+      standard-output or executes a given command.
+    '';
+
+    platforms = lib.platforms.linux;
+  };
+}