check_software: tolerate libthread_db from system

this is part of libc
2 jobs for fix/checkSoftware_so in 0 seconds (queued for 1 second)
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

04:49:47

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

22:47:35