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/atftp/default.nix

@@ -0,0 +1,32 @@
+{ lib, stdenv, fetchurl, readline, tcp_wrappers, pcre, makeWrapper, gcc, ps }:
+
+stdenv.mkDerivation rec {
+  pname = "atftp";
+  version = "0.7.5";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/atftp/${pname}-${version}.tar.gz";
+    sha256 = "12h3sgkd25j4nfagil2jqyj1n8yxvaawj0cf01742642n57pmj4k";
+  };
+
+  # fix test script
+  postPatch = ''
+    patchShebangs .
+  '';
+
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ readline tcp_wrappers pcre gcc ];
+
+  # Expects pre-GCC5 inline semantics
+  NIX_CFLAGS_COMPILE = "-std=gnu89";
+
+  doCheck = true;
+  checkInputs = [ ps ];
+
+  meta = {
+    description = "Advanced tftp tools";
+    maintainers = [ lib.maintainers.raskin ];
+    platforms = lib.platforms.linux;
+    license = lib.licenses.gpl2Plus;
+  };
+}