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/desktops/gnustep/back/default.nix

@@ -0,0 +1,25 @@
+{ gsmakeDerivation
+, cairo
+, fetchzip
+, base, gui
+, xlibsWrapper
+, freetype
+, pkg-config
+, libXmu
+}:
+
+gsmakeDerivation rec {
+  pname = "gnustep-back";
+  version = "0.29.0";
+
+  src = fetchzip {
+    url = "ftp://ftp.gnustep.org/pub/gnustep/core/${pname}-${version}.tar.gz";
+    sha256 = "sha256-4n2SC68G0dpSz9nqCL5Kz76nyoRxWcRTWDwZsnMoHSM=";
+  };
+
+  nativeBuildInputs = [ pkg-config ];
+  buildInputs = [ cairo base gui freetype xlibsWrapper libXmu ];
+  meta = {
+    description = "A generic backend for GNUstep";
+  };
+}