have a new, and seemingly consistent test failure on freebsd: bind.unit.isc_mem_recordflag

first failure caught by jenkins at revision: af4b4bef7a43d17912dd03c9c7b2e8ed043f1256
previous tested revision (that did not see this failure): 2a08a599ee271e1301d7f82ff4ca237583fece5c

https://jenkins.isc.org/view/BIND/job/bind9-master-freebsd11-64/478/consoleFull

this test also fails on macmini builds for the master branch