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/data/misc/dns-root-data/default.nix

@@ -0,0 +1,36 @@
+{ stdenv, lib, fetchurl }:
+
+let
+
+  rootHints = fetchurl {
+    # Original source https://www.internic.net/domain/named.root
+    # occasionally suffers from pointless hash changes,
+    # and having stable sources for older versions has advantages, too.
+    urls = map (prefix: prefix + "cc5e14a264912/etc/root.hints") [
+      "https://gitlab.nic.cz/knot/knot-resolver/raw/"
+      "https://raw.githubusercontent.com/CZ-NIC/knot-resolver/"
+    ];
+    sha256 = "0vdrff4l8s8grif52dnh091s8qydhh88k25zqd9rj66sf1qwcwxl";
+  };
+
+  rootKey = ./root.key;
+  rootDs = ./root.ds;
+
+in
+
+stdenv.mkDerivation {
+  pname = "dns-root-data";
+  version = "2019-01-11";
+
+  buildCommand = ''
+    mkdir $out
+    cp ${rootHints} $out/root.hints
+    cp ${rootKey} $out/root.key
+    cp ${rootDs} $out/root.ds
+  '';
+
+  meta = with lib; {
+    description = "DNS root data including root zone and DNSSEC key";
+    maintainers = with maintainers; [ fpletz vcunat ];
+  };
+}