check_software: fix a wrong condition making the check ignore .so

fnmatch.fnmatch signature is path, pattern, we were passing arguments in
reverse order, so effectively we were only checking executable files.
Several .so are executable, so we were checking many .so anyway.
5 jobs for fix/checkSoftware_so in 0 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  External
failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

04:41:46

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

29:29:05

failed SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

05:32:20

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-Python3

00:05:43

canceled SlapOS.SoftwareReleases.IntegrationTest-Jerome-WIP

17:12:16