consolekit: populate log directory

Replace /var/log/ConsoleKit with tmpfiles.d conf because
/var/log is a simlink pointing to /var/volatile/log which is tmpfs.

Ported from:
    https://github.com/MentorEmbedded/mel-meta-atp/commit/4e90dd8d21593b7fa956153b2043d71a3aab5ffc

Signed-off-by: Drew Moseley <drew_moseley@mentor.com>