Update submodules: plugins (new commits)

plugins:
    67f0c60 Greg Holmes <greg@dmdirc.com>
            Use events for the logging plugin.

            Depends-On: Id53eb0fba852cf19e80dbd51d6b45fc9fc3dbee6
            Gerrit: http://gerrit.dmdirc.com/3497

Change-Id: Iae3088d55df7403e8295e8f0f65e8db366ba606a
Update submodules: plugins (new commits)

plugins:
    16dc8c8 Greg Holmes <greg@dmdirc.com>
            Convert DCC Plugin to use events.

            Gerrit: http://gerrit.dmdirc.com/3494

    d1900b8 Greg Holmes <greg@dmdirc.com>
            Use events in lag display.

            Depends-On: Id53eb0fba852cf19e80dbd51d6b45fc9fc3dbee6
            Gerrit: http://gerrit.dmdirc.com/3496

Change-Id: Ie18b4333d592e7df2f20bba40bf5b07fbf2ee281