Update submodules: util (new commits)

util:
    4ec0f9f Chris Smith <chris@dmdirc.com>
            Tidy

            Gerrit: http://gerrit.dmdirc.com/3943

Change-Id: Idc40e52bab7b2a3c861e22f7b9cb3e69e1ddd0b3
Add findbugs reports, don't fail the build on them.

Change-Id: I9e52ff2493bf33e8f5e61f027e15505dc407d2cb
Reviewed-on: http://gerrit.dmdirc.com/3944
Reviewed-by: Greg Holmes <greg@dmdirc.com>
Automatic-Compile: DMDirc Build Manager