task/selinux: another pcp whitelist
task/selinux: another pcp whitelist

SELinux denials found on ubuntu@smithi027.front.sepia.ceph.com: ['type=AVC msg=audit(1462234212.274:85266): avc: denied { read } for pid=1984 comm="pmcd" name="pmlogger_daily.pid" dev="tmpfs" ino=1474542 scontext=system_u:system_r:pcp_pmcd_t:s0 tcontext=system_u:object_r:cron_var_run_t:s0 tclass=file']

Signed-off-by: Sage Weil <6dd34506bbd5e58221bbb3e4732d97c91f02277b@redhat.com>

SUSE/teuthology,dmick/teuthology,SUSE/teuthology,ktdreyer/teuthology,ktdreyer/teuthology,ceph/teuthology,SUSE/teuthology,dmick/teuthology,ceph/teuthology,dmick/teuthology