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/applications/graphics/graphicsmagick/compat.nix

@@ -0,0 +1,37 @@
+{ lib, stdenv, graphicsmagick }:
+
+stdenv.mkDerivation {
+  pname = "graphicsmagick-imagemagick-compat";
+  inherit (graphicsmagick) version;
+
+  dontUnpack = true;
+  buildPhase = "true";
+
+  utils = [
+    "composite"
+    "conjure"
+    "convert"
+    "identify"
+    "mogrify"
+    "montage"
+    "animate"
+    "display"
+    "import"
+  ];
+
+  # TODO: symlink libraries?
+  installPhase = ''
+    mkdir -p "$out"/bin
+    mkdir -p "$out"/share/man/man1
+    for util in ''${utils[@]}; do
+      ln -s ${graphicsmagick}/bin/gm "$out/bin/$util"
+      ln -s ${graphicsmagick}/share/man/man1/gm.1.gz "$out/share/man/man1/$util.1.gz"
+    done
+  '';
+
+  meta = {
+    description = "ImageMagick interface for GraphicsMagick";
+    license = lib.licenses.free;
+    platforms = lib.platforms.all;
+  };
+}