Fix Unity3d Android Build Support's NDK path symlink

fix-unity-ndk-path.sh

#!/usr/bin/env bash

UNITY_HUB_EDITOR=${1:-$HOME/Unity/Hub/Editor}
pushd "$UNITY_HUB_EDITOR" > /dev/null

for UNITY in *; do
        echo "Checking: $UNITY"
        CLANGPP="./$UNITY/Editor/Data/PlaybackEngines/AndroidPlayer/NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/clang++"
        if ! [ -f "$CLANGPP" ]; then
                echo "  Android Build Support is not installed"
                continue
        fi

        LINKED_TO=$(readlink "$CLANGPP")
        NDK_VERSION=$(sed -nE 's/^.*\/NDK\/(.*)\/toolchains\/.*$/\1/p' <<<"$LINKED_TO")
        echo "  NDK version detected: $NDK_VERSION"

        pushd "./$UNITY/Editor/Data/PlaybackEngines/AndroidPlayer/NDK/" > /dev/null
        echo "  Making symlink"
        ln -s ./ "./$NDK_VERSION"
        popd > /dev/null
done