Snippets for libiio 0.26 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/yasnm5qmlpw53r0c9fmby6g0g4bcql8y-libiio-0.26.drv.

• /build/source/xml.c:524:9: warning: 'xmlMemoryDump' is deprecated: See https://gnome.pages.gitlab.gnome.org/libxml2/html/deprecated.html [-Wdeprecated-declarations]
    524 |         xmlMemoryDump();
        |         ^~~~~~~~~~~~~