Revert "Revert "recovery: fix --update_package using legacy path""

    ui_set_background(BACKGROUND_ICON_INSTALLING);

    ui_print("Finding update package...\n");

    ui_show_indeterminate_progress();

    // Resolve symlink in case legacy /sdcard path is used

    // Requires: symlink uses absolute path

    char new_path[PATH_MAX];

    if (strlen(path) > 1) {

        char *rest = strchr(path + 1, '/');

        if (rest != NULL) {

            int readlink_length;

            int root_length = rest - path;

            char *root = malloc(root_length + 1);

            strncpy(root, path, root_length);

            root[root_length] = 0;

            readlink_length = readlink(root, new_path, PATH_MAX);

            if (readlink_length > 0) {

                strncpy(new_path + readlink_length, rest, PATH_MAX - readlink_length);

                path = new_path;

            }

            free(root);

        }

    }

    LOGI("Update location: %s\n", path);

    if (ensure_path_mounted(path) != 0) {