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/tools/misc/homesick/default.nix

@@ -0,0 +1,28 @@
+{ lib, bundlerEnv, bundlerUpdateScript, git }:
+bundlerEnv {
+  pname = "homesick";
+
+  gemdir = ./.;
+
+  # Cannot use `wrapProgram` because the the help is aware of the file name.
+  postInstall = ''
+    rm $out/bin/thor
+    sed 1a'ENV["PATH"] = "${git}/bin:#{ENV["PATH"] ? ":#{ENV["PATH"]}" : "" }"' -i $out/bin/homesick
+  '';
+
+  passthru.updateScript = bundlerUpdateScript "homesick";
+
+  meta = with lib; {
+    description = "Your home directory is your castle. Don't leave your dotfiles behind";
+    longDescription =
+      ''
+        Homesick is sorta like rip, but for dotfiles. It uses git to clone a repository containing
+        dotfiles, and saves them in ~/.homesick. It then allows you to symlink all the dotfiles into
+        place with a single command.
+      '';
+    homepage = "https://github.com/technicalpickles/homesick";
+    license = licenses.mit;
+    maintainers = with maintainers; [ aaronschif nicknovitski ];
+    platforms = platforms.unix;
+  };
+}