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/sharedown/update.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p common-updater-scripts curl jq yarn yarn2nix-moretea.yarn2nix
+
+set -euo pipefail
+
+owner=kylon
+repo=Sharedown
+latestVersion=$(curl "https://api.github.com/repos/$owner/$repo/releases/latest" | jq -r '.tag_name')
+currentVersion=$(nix-instantiate --eval --expr 'with import ./. {}; sharedown.version' | tr -d '"')
+
+if [[ "$currentVersion" == "$latestVersion" && "${BUMP_LOCK-}" != "1" ]]; then
+    # Skip update when already on the latest version.
+    exit 0
+fi
+
+update-source-version sharedown "$latestVersion"
+
+dirname="$(realpath "$(dirname "$0")")"
+sourceDir="$(nix-build -A sharedown.src --no-out-link)"
+tempDir="$(mktemp -d)"
+
+cp -r "$sourceDir"/* "$tempDir"
+cd "$tempDir"
+PUPPETEER_SKIP_DOWNLOAD=1 yarn install
+yarn2nix > "$dirname/yarndeps.nix"
+cp -r yarn.lock "$dirname"