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/nym/update.sh

@@ -0,0 +1,37 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p curl jq nix-prefetch
+
+# adapted from rust-analyzer
+
+set -euo pipefail
+cd "$(dirname "$0")"
+nixpkgs=../../../..
+
+owner=$(sed -nE 's/.*\bowner = "(.*)".*/\1/p' ./default.nix)
+repo=$(sed -nE 's/.*\brepo = "(.*)".*/\1/p' ./default.nix)
+rev=$(
+    curl -s "https://api.github.com/repos/$owner/$repo/releases" |
+    jq 'map(select(.prerelease | not)) | .[0].tag_name' --raw-output
+)
+version=${rev:1}
+old_version=$(sed -nE 's/.*\bversion = "(.*)".*/\1/p' ./default.nix)
+if grep -q 'cargoSha256 = ""' ./default.nix; then
+    old_version='broken'
+fi
+if [[ "$version" == "$old_version" ]]; then
+    echo "Up to date: $version"
+    exit
+fi
+echo "$old_version -> $version"
+
+sha256=$(nix-prefetch -f "$nixpkgs" nym.src --rev "$rev")
+# Clear cargoSha256 to avoid inconsistency.
+sed -e "s/version = \".*\"/version = \"$version\"/" \
+    -e "s/sha256 = \".*\"/sha256 = \"$sha256\"/" \
+    -e "s/cargoSha256 = \".*\"/cargoSha256 = \"\"/" \
+    --in-place ./default.nix
+
+echo "Prebuilding for cargoSha256"
+cargo_sha256=$(nix-prefetch "{ sha256 }: (import $nixpkgs {}).nym.cargoDeps.overrideAttrs (_: { outputHash = sha256; })")
+sed "s/cargoSha256 = \".*\"/cargoSha256 = \"$cargo_sha256\"/" \
+    --in-place ./default.nix