Bug#1005906: additional testing

[David Eccles <deccles@malaghan.org.nz>]

Also failing for 2.33-1 (as found in 'debian:testing-20211220' docker image):

root@3385b6c8f2c8:/# if test -x /usr/bin/head; then echo "/usr/bin/head is executable"; else  echo "dead beef"; fi; dpkg-query -l libc6
dead beef
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name           Version      Architecture Description
+++-==============-============-============-=================================
ii  libc6:amd64    2.33-1       amd64        GNU C Library: Shared libraries