qa/025: cleanup some odd temporary files
qa/025: cleanup some odd temporary files

._wait_for_pmlogger.host and ._wait_for_pmlogger.pmlc come from
src/pmcdgone running _wait_for_pmlogger w/out $tmp being set ...
which eventually exposed a corner-case bug in qa/1216 (pmlogctl)

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp