Snippets for abootimg 0.6 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/ppqh94qlxfiw1ysih6ny45csd97zdfry-abootimg-0.6.drv.

• abootimg.c:696:3: warning: ignoring return value of 'ftruncate' declared with attribute 'warn_unused_result' [-Wunused-result]
    696 |   ftruncate (fileno(img->stream), img->size);
        |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~