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/servers/web-apps/ethercalc/generate.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p nodePackages.node2nix
+
+# Run this script not via `./generate.sh`, but via `$PWD/generate.sh`.
+# Else `nix-shell` will not find this script.
+
+set -euo pipefail
+
+cd -- "$(dirname -- "$BASH_SOURCE[0]")"
+
+node2nix \
+     --nodejs-14 \
+     --input node-packages.json \
+     --output node-packages-generated.nix \
+     --composition node-packages.nix \
+     --node-env ../../../development/node-packages/node-env.nix