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/networking/instant-messengers/element/update.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -I nixpkgs=../../../../../ -i bash -p nix wget prefetch-yarn-deps nix-prefetch-github
+
+if [ "$#" -gt 1 ] || [[ "$1" == -* ]]; then
+  echo "Regenerates packaging data for the element packages."
+  echo "Usage: $0 [git release tag]"
+  exit 1
+fi
+
+version="$1"
+
+set -euo pipefail
+
+if [ -z "$version" ]; then
+  version="$(wget -O- "https://api.github.com/repos/vector-im/element-desktop/releases?per_page=1" | jq -r '.[0].tag_name')"
+fi
+
+# strip leading "v"
+version="${version#v}"
+
+desktop_src="https://raw.githubusercontent.com/vector-im/element-desktop/v$version"
+
+desktop_src_hash=$(nix-prefetch-github vector-im element-desktop --rev v${version} | jq -r .sha256)
+web_hash=$(nix-prefetch-url "https://github.com/vector-im/element-web/releases/download/v$version/element-v$version.tar.gz")
+
+wget "$desktop_src/package.json" -O element-desktop-package.json
+
+tmpdir=$(mktemp -d)
+trap 'rm -rf "$tmpdir"' EXIT
+
+pushd $tmpdir
+wget "$desktop_src/yarn.lock"
+desktop_yarn_hash=$(prefetch-yarn-deps yarn.lock)
+popd
+
+cat > pin.json << EOF
+{
+  "version": "$version",
+  "desktopSrcHash": "$desktop_src_hash",
+  "desktopYarnHash": "$desktop_yarn_hash",
+  "webHash": "$web_hash"
+}
+EOF