Update submodules: util (new commits)

util:
    7ba58d1 Chris Smith <chris@dmdirc.com>
            Tidying.

            Remove pointless super() calls.
            Remove redundant interface decs.
            Remove unnecessary enum annotations.
            Change .length == 0 to .isEmpty.

            Gerrit: http://gerrit.dmdirc.com/3843

Change-Id: I9ea96a4310c198404c0285efd32042faeb04d695

modules/util

@@ -1 +1 @@
-Subproject commit 40a3a41c2ea96ca289292ad92959a32df425a58d
+Subproject commit 7ba58d10ca6b065e2f516a3800a3bb5573d4531a