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/games/dwarf-fortress/update.sh

@@ -0,0 +1,42 @@
+#!/usr/bin/env nix-shell
+#! nix-shell -i bash -p jq nix coreutils curl
+
+# systems to generate hashes for
+systems='linux linux32 osx osx32
+     win win_s win32 win32_s
+         legacy legacy_s legacy32 legacy32_s'
+
+if [ $# -eq 0 ]; then
+    versions="$(curl http://www.bay12games.com/dwarves/ \
+           | grep 'DWARF FORTRESS CLASSIC ' \
+           | sed 's/.*DWARF FORTRESS CLASSIC \([0-9.]*\) .*/\1/')"
+else
+    versions="$@"
+fi
+
+tmp1="$(mktemp)"
+tmp2="$(mktemp)"
+for version in $versions; do
+    for system in $systems; do
+    echo -n $version,$system,
+    ver=$(echo $version | sed -e s,^0\.,, | tr . _)
+    if [[ "$system" = *win* ]] || [[ "$system" = *legacy* ]]; then
+        ext=zip
+    else
+        ext=tar.bz2
+    fi
+    nix-prefetch-url \
+        http://www.bay12games.com/dwarves/df_${ver}_${system}.${ext}
+    done
+done | jq --slurp --raw-input \
+      'split("\n")  | .[:-1] | map(split(",")) |
+           map({ "version": .[0], "platform": .[1], "sha256": .[2] }) |
+       group_by(.version) |
+       map(map({"version": .version, (.platform): .sha256}) | add |
+           {(.version): .} | map_values(del(.version))) | add' \
+      > "$tmp1"
+
+# Append $tmp1 to game.json. There should be a better way to handle
+# this but all other attempts failed for me.
+jq -M --argfile a "$tmp1" '. + $a' < "$(dirname "$0")/game.json" > "$tmp2"
+cat "$tmp2" > "$(dirname "$0")/game.json"