Update submodules: plugins (new commits)

plugins:
    f1fc5cd Chris Smith <chris@dmdirc.com>
            Create the status bar on the EDT.

            Oopsy.

            Gerrit: http://gerrit.dmdirc.com/3266

Change-Id: I78ccd1e61bbb1a06742a3e04ebd71583f5ee5ab0