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/os-specific/windows/mingwrt/default.nix

@@ -0,0 +1,18 @@
+{ stdenv, lib, fetchurl }:
+
+stdenv.mkDerivation rec {
+  pname = "mingwrt";
+  version = "5.0.2";
+
+  src = fetchurl {
+    url = "mirror://sourceforge/mingw/MinGW/Base/mingwrt/mingwrt-${version}/mingwrt-${version}-mingw32-src.tar.xz";
+    sha256 = "1vj6f578wcffdmy7zzf7xz1lw57kxjy08j0k1n28f0j4ylrk68vp";
+  };
+
+  meta = {
+    platforms = lib.platforms.windows;
+  };
+
+  dontStrip = true;
+  hardeningDisable = [ "stackprotector" "fortify" ];
+}