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/grub/default.nix

@@ -0,0 +1,40 @@
+{ lib, stdenv, fetchurl, autoreconfHook, texinfo, buggyBiosCDSupport ? true }:
+
+stdenv.mkDerivation rec {
+  pname = "grub";
+  version = "0.97-73";
+
+  src = fetchurl {
+    url = "https://alpha.gnu.org/gnu/grub/grub-${lib.versions.majorMinor version}.tar.gz";
+    sha256 = "02r6b52r0nsp6ryqfiqchnl7r1d9smm80sqx24494gmx5p8ia7af";
+  };
+
+  patches = [
+    # Properly handle the case of symlinks such as
+    # /dev/disk/by-label/bla.  The symlink resolution code in
+    # grub-install isn't smart enough.
+    ./symlink.patch
+  ]
+  ++ (lib.optional buggyBiosCDSupport ./buggybios.patch)
+  ++ map fetchurl (import ./grub1.patches.nix)
+  ;
+
+  preConfigure = ''
+    substituteInPlace ./configure.ac --replace 'AC_PREREQ(2.61)' 'AC_PREREQ(2.64)'
+  '';
+
+  # autoreconfHook required for the splashimage patch.
+  nativeBuildInputs = [ autoreconfHook ];
+  buildInputs = [ texinfo ];
+
+  hardeningDisable = [ "format" "stackprotector" ];
+
+  passthru.grubTarget = "";
+
+  meta = with lib; {
+    homepage = "https://www.gnu.org/software/grub";
+    description = "GRand Unified Bootloader";
+    license = licenses.gpl2;
+    platforms = platforms.linux;
+  };
+}