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/os-specific/linux/cpufrequtils/default.nix

@@ -0,0 +1,31 @@
+{ lib, stdenv, fetchurl, libtool, gettext }:
+
+stdenv.mkDerivation rec {
+  pname = "cpufrequtils";
+  version = "008";
+
+  src = fetchurl {
+    url = "http://ftp.be.debian.org/pub/linux/utils/kernel/cpufreq/cpufrequtils-${version}.tar.gz";
+    sha256 = "127i38d4w1hv2dzdy756gmbhq25q3k34nqb2s0xlhsfhhdqs0lq0";
+  };
+
+  patches = [
+    # I am not 100% sure that this is ok, but it breaks repeatable builds.
+    ./remove-pot-creation-date.patch
+  ];
+
+  patchPhase = ''
+    sed -e "s@= /usr/bin/@= @g" \
+      -e "s@/usr/@$out/@" \
+      -i Makefile
+  '';
+
+  buildInputs = [ stdenv.cc.libc.linuxHeaders libtool gettext ];
+
+  meta = with lib; {
+    description = "Tools to display or change the CPU governor settings";
+    homepage = "http://ftp.be.debian.org/pub/linux/utils/kernel/cpufreq/cpufrequtils.html";
+    license = licenses.gpl2Only;
+    platforms = [ "x86_64-linux" ];
+  };
+}