Snippets for abootimg 0.6 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/93dschhn1nx8pf3b3h2snianjz2j28q0-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);
        |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~