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/numdiff/default.nix

@@ -0,0 +1,26 @@
+{ lib, stdenv, fetchurl, libintl }:
+
+
+stdenv.mkDerivation rec {
+  pname = "numdiff";
+  version = "5.9.0";
+
+  src = fetchurl {
+    url = "mirror://savannah/numdiff/numdiff-${version}.tar.gz";
+    sha256 = "1vzmjh8mhwwysn4x4m2vif7q2k8i19x8azq7pzmkwwj4g48lla47";
+  };
+
+  buildInputs = [ libintl ];
+
+  meta = with lib; {
+    description = ''
+      A little program that can be used to compare putatively similar files
+      line by line and field by field, ignoring small numeric differences
+      or/and different numeric formats
+    '';
+    homepage = "https://www.nongnu.org/numdiff/";
+    license = licenses.gpl3Plus;
+    maintainers = with maintainers; [];
+    platforms = platforms.unix;
+  };
+}