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/networking/htpdate/default.nix

@@ -0,0 +1,25 @@
+{ stdenv, lib, fetchFromGitHub }:
+
+stdenv.mkDerivation rec {
+  version = "1.3.3";
+  pname = "htpdate";
+
+  src = fetchFromGitHub {
+    owner = "twekkel";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "sha256-/xZxwEui8V5kyfGsmwRRkiyhj7lcJQaTmOjBihvdWg8=";
+  };
+
+  makeFlags = [
+    "prefix=$(out)"
+  ];
+
+  meta = with lib; {
+    description = "Utility to fetch time and set the system clock over HTTP";
+    homepage = "https://github.com/twekkel/htpdate";
+    platforms = platforms.linux;
+    license = licenses.gpl2Plus;
+    maintainers = with maintainers; [ julienmalka ];
+  };
+}