Snippets for alsa-lib 1.2.16.1 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/vg607bb7m8f8p6h3f9msxcaf3kx9x3j2-alsa-lib-1.2.16.1.drv.

• pcm_share.c:418:39: warning: ignoring return value of 'read' declared with attribute 'warn_unused_result' [-Wunused-result]
    418 |                                 (void)read(pfd[0].fd, buf, 1);
        |                                       ^~~~~~~~~~~~~~~~~~~~~~~