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/text/num-utils/default.nix

@@ -0,0 +1,29 @@
+{ lib, stdenv, fetchurl, perl }:
+
+stdenv.mkDerivation rec {
+  pname = "num-utils";
+  version = "0.5";
+
+  src = fetchurl {
+    url = "https://suso.suso.org/programs/num-utils/downloads/num-utils-${version}.tar.gz";
+    sha256 = "0kn6yskjww2agcqvas5l2xp55mp4njdxqkdicchlji3qzih2fn83";
+  };
+
+  buildInputs = [ perl ];
+
+  patchPhase = ''
+    substituteInPlace Makefile --replace "-o 0 -g 0" "" --replace "\$(RPMDIR)" ""
+  '';
+  makeFlags = [
+    "TOPDIR=${placeholder "out"}"
+    "PERL=${perl}/bin/perl"
+  ];
+
+  meta = with lib; {
+    description = "Programs for dealing with numbers from the command line";
+    homepage = "https://suso.suso.org/xulu/Num-utils";
+    license = licenses.gpl2Plus;
+    platforms = platforms.all;
+    maintainers = [ maintainers.catern ];
+  };
+}