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/misc/sfeed/default.nix

@@ -0,0 +1,38 @@
+{ stdenv, lib, fetchgit, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "sfeed";
+  version = "1.4";
+
+  src = fetchgit {
+    url = "git://git.codemadness.org/sfeed";
+    rev = version;
+    sha256 = "sha256-fn+PE0WwBdllsO1gXbM2Ftdrl8ua/v50Ny4C/J4OK8Q=";
+  };
+
+  buildInputs = [ ncurses ];
+
+  makeFlags = [ "RANLIB:=$(RANLIB)" "SFEED_CURSES_LDFLAGS:=-lncurses" ]
+    # use macOS's strlcat() and strlcpy() instead of vendored ones
+    ++ lib.optional stdenv.isDarwin "COMPATOBJ:=";
+
+  installFlags = [ "PREFIX=$(out)" ];
+
+  # otherwise does not find SIGWINCH
+  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.isDarwin "-D_DARWIN_C_SOURCE";
+
+  meta = with lib; {
+    homepage = "https://codemadness.org/sfeed-simple-feed-parser.html";
+    description = "A RSS and Atom parser (and some format programs)";
+    longDescription = ''
+      It converts RSS or Atom feeds from XML to a TAB-separated file. There are
+      formatting programs included to convert this TAB-separated format to
+      various other formats. There are also some programs and scripts included
+      to import and export OPML and to fetch, filter, merge and order feed
+      items.
+    '';
+    license = licenses.isc;
+    maintainers = [ maintainers.matthiasbeyer ];
+    platforms = platforms.all;
+  };
+}