Snippets for libiio 0.25 from Alpine s390x

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-s390x/testing/libiio/libiio-0.25-r3.log.

• /home/buildozer/aports/testing/libiio/src/libiio-0.25/xml.c:523:9: warning: 'xmlMemoryDump' is deprecated [-Wdeprecated-declarations]
    523 |         xmlMemoryDump();
        |         ^~~~~~~~~~~~~