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/grub4dos/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub, nasm }:
+
+let arch =
+  if stdenv.isi686 then "i386"
+  else if stdenv.isx86_64 then "x86_64"
+  else throw "Unknown architecture";
+in stdenv.mkDerivation {
+  pname = "grub4dos";
+  version = "0.4.6a-2019-05-12";
+
+  src = fetchFromGitHub {
+    owner = "chenall";
+    repo = "grub4dos";
+    rev = "e8224a2d20760139ffaeafa07838e2c3c54de783";
+    sha256 = "0i7n71za43qnlsxfvjrv1z5g1w5jl9snpbnas7rw97rry7cgyswf";
+  };
+
+  nativeBuildInputs = [ nasm ];
+
+  hardeningDisable = [ "stackprotector" ];
+
+  configureFlags = [ "--host=${arch}-pc-linux-gnu" ];
+
+  postInstall = ''
+    mv $out/lib/grub/${arch}-pc/* $out/lib/grub
+    rmdir $out/lib/grub/${arch}-pc
+    chmod +x $out/lib/grub/bootlace.com
+  '';
+
+  dontStrip = true;
+  dontPatchELF = true;
+
+  # make[2]: *** No rule to make target 'pre_stage2_fullsize', needed by 'all-am'.  Stop.
+  enableParallelBuilding = false;
+
+  meta = with lib; {
+    homepage = "http://grub4dos.chenall.net/";
+    description = "GRUB for DOS is the dos extension of GRUB";
+    maintainers = with maintainers; [ abbradar ];
+    platforms = platforms.linux;
+    license = licenses.gpl2;
+  };
+}