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/backup/dar/default.nix

@@ -0,0 +1,55 @@
+{ lib, stdenv, fetchurl
+, which
+, attr, e2fsprogs
+, curl, libargon2, librsync, libthreadar
+, gpgme, libgcrypt, openssl
+, bzip2, lz4, lzo, xz, zlib
+}:
+
+with lib;
+
+stdenv.mkDerivation rec {
+  version = "2.7.5";
+  pname = "dar";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/dar/${pname}-${version}.tar.gz";
+    sha256 = "sha256-lfpJOomadV/oTJsOloH1rYF5Wy3kVr+EBUvqZ+xaCWY=";
+  };
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [ which ];
+
+  buildInputs = [
+    curl librsync libthreadar
+    gpgme libargon2 libgcrypt openssl
+    bzip2 lz4 lzo xz zlib
+  ] ++ optionals stdenv.isLinux [ attr e2fsprogs ];
+
+  configureFlags = [
+    "--disable-birthtime"
+    "--disable-upx"
+    "--disable-dar-static"
+    "--disable-build-html"
+    "--enable-threadar"
+  ];
+
+  postInstall = ''
+    # Disable html help
+    rm -r "$out"/share/dar
+  '';
+
+  enableParallelBuilding = true;
+
+  hardeningDisable = [ "format" ];
+
+  meta = {
+    broken = stdenv.isDarwin;
+    homepage = "http://dar.linux.free.fr";
+    description = "Disk ARchiver, allows backing up files into indexed archives";
+    maintainers = with maintainers; [ izorkin ];
+    license = licenses.gpl2;
+    platforms = platforms.unix;
+  };
+}