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/filesystems/dosfstools/default.nix

@@ -0,0 +1,43 @@
+{ lib, stdenv, fetchFromGitHub, fetchpatch, autoreconfHook, pkg-config, libiconv, gettext, xxd }:
+
+stdenv.mkDerivation rec {
+  pname = "dosfstools";
+  version = "4.2";
+
+  src = fetchFromGitHub {
+    owner = "dosfstools";
+    repo = "dosfstools";
+    rev = "v${version}";
+    sha256 = "sha256-2gxB0lQixiHOHw8uTetHekaM57fvUd9zOzSxWnvUz/c=";
+  };
+
+  patches = [
+    # macOS build fixes backported from master
+    # TODO: remove on the next release
+    (fetchpatch {
+      url = "https://github.com/dosfstools/dosfstools/commit/77ffb87e8272760b3bb2dec8f722103b0effb801.patch";
+      sha256 = "sha256-xHxIs3faHK/sK3vAVoG8JcTe4zAV+ZtkozWIIFBvPWI=";
+    })
+  ];
+
+  nativeBuildInputs = [ autoreconfHook pkg-config ]
+    ++ lib.optional stdenv.isDarwin libiconv;
+
+  # configure.ac:75: error: required file './config.rpath' not found
+  # https://github.com/dosfstools/dosfstools/blob/master/autogen.sh
+  postPatch = ''
+    cp ${gettext}/share/gettext/config.rpath config.rpath
+  '';
+
+  configureFlags = [ "--enable-compat-symlinks" ];
+
+  checkInputs = [ xxd ];
+  doCheck = true;
+
+  meta = {
+    description = "Utilities for creating and checking FAT and VFAT file systems";
+    homepage = "https://github.com/dosfstools/dosfstools";
+    platforms = lib.platforms.linux ++ lib.platforms.darwin;
+    license = lib.licenses.gpl3;
+  };
+}