Update submodules: plugins (new commits)

plugins:
    d42a901 Chris Smith <chris@dmdirc.com>
            Add dagger dependency to plugins (again).

            Keeping the compiler in the build group prevents it being put on
            the classpath twice and causing massive problems.

            Gerrit: http://gerrit.dmdirc.com/2850

Change-Id: Iee1cbf27061028b261b5211a88db55ced6d1f37d
Call the new plugin load method.

Change-Id: I2b09c5bc25e783fa249e480c86b92edbe91f135b
Reviewed-on: http://gerrit.dmdirc.com/2851
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Greg Holmes <greg@dmdirc.com>