Update submodules: plugins (new commits)

plugins:
    84ac4c9 Greg Holmes <greg@dmdirc.com>
            Switch to event bug logging in DCC plugin.

            Gerrit: http://gerrit.dmdirc.com/3653

Change-Id: Ief6978d53c9619e79c2182ed10ae460b5887f1b8
Update submodules: plugins (new commits)

plugins:
    d540900 Greg Holmes <greg@dmdirc.com>
            Switch to event bug logging in Identd plugin.

            Gerrit: http://gerrit.dmdirc.com/3655

    1713bb8 Greg Holmes <greg@dmdirc.com>
            Switch to event bug logging in Debug plugin.

            Gerrit: http://gerrit.dmdirc.com/3654

Change-Id: If651e22177030f50f7af055fe3407bdb252c3efa
Update submodules: plugins (new commits)

plugins:
    c8003bc Greg Holmes <greg@dmdirc.com>
            Switch to event bug logging in logging plugin.

            Gerrit: http://gerrit.dmdirc.com/3656

Change-Id: I997229703244069b49c729bb83766df67747ce8f