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/development/libraries/impy/default.nix

@@ -0,0 +1,44 @@
+{ lib, stdenv
+, fetchFromGitHub
+, cmake
+, pkg-config
+, libpng
+, zlib
+, giflib
+, libjpeg
+, SDL2
+}:
+
+stdenv.mkDerivation rec {
+  pname = "impy";
+  version = "0.1";
+
+  src = fetchFromGitHub {
+    owner = "bcampbell";
+    repo = "impy";
+    rev = "v${version}";
+    sha256 = "1h45xjms56radhknspyx17a12dpnm7xgqm1x1chy42aw5ic8b5qf";
+  };
+
+  nativeBuildInputs = [
+    cmake
+    pkg-config
+  ];
+
+  buildInputs = [
+    libpng
+    zlib
+    giflib
+    libjpeg
+    SDL2
+  ];
+
+  meta = with lib; {
+    description = "A simple library for loading/saving images and animations, written in C";
+    homepage = "https://github.com/bcampbell/impy";
+    license = licenses.gpl3;
+    maintainers = with maintainers; [ fgaz ];
+    platforms = platforms.all;
+  };
+}
+