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/mktorrent/default.nix

@@ -0,0 +1,28 @@
+{lib, stdenv, fetchFromGitHub, openssl}:
+
+stdenv.mkDerivation rec {
+  pname = "mktorrent";
+  version = "1.1";
+
+  src = fetchFromGitHub {
+    owner = "pobrn";
+    repo = "mktorrent";
+    rev = "v${version}";
+    sha256 = "17pdc5mandl739f8q26n5is8ga56s83aqcrwhlnnplbxwx2inidr";
+  };
+
+  makeFlags = [ "USE_PTHREADS=1" "USE_OPENSSL=1" "USE_LONG_OPTIONS=1" ]
+    ++ lib.optional stdenv.isi686 "USE_LARGE_FILES=1"
+    ++ lib.optional stdenv.isLinux "CFLAGS=-lgcc_s";
+
+  installFlags = [ "PREFIX=${placeholder "out"}" ];
+
+  buildInputs = [ openssl ];
+
+  meta = {
+    homepage = "https://github.com/pobrn/mktorrent/wiki";
+    license = lib.licenses.gpl2Plus;
+    description = "Command line utility to create BitTorrent metainfo files";
+    maintainers = with lib.maintainers; [Profpatsch];
+  };
+}