[core-updates] It would be nice to fix libsndfile CVE-2021-3246 (arbitrary code execution via crafted WAV file)

[Leo Famulari]

See <https://issues.guix.gnu.org/issue/49817>, which was never applied
anywhere. Like I said in that thread, I no longer understand the patch,
but I guess it's enough to update libsndfile to 1.1.0 on core-updates.