Update submodules: util (new commits)

util:
    2b76d27 Chris Smith <chris@dmdirc.com>
            Couple of bug fixes.

            Don't try and resole using a path from another FS provider.

            Create paths via URIs not via strings, as otherwise it gets
            confused with protocols.

            Gerrit: http://gerrit.dmdirc.com/4043

Change-Id: Icdec4c8055a480235f6105b3552cefa408be5193