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/mingw-w64/headers.nix

@@ -0,0 +1,11 @@
+{ stdenvNoCC, mingw_w64 }:
+
+stdenvNoCC.mkDerivation {
+  name = "${mingw_w64.name}-headers";
+  inherit (mingw_w64) src meta;
+
+  preConfigure = ''
+    cd mingw-w64-headers
+  '';
+
+}