Update submodules: util (new commits)

util:
    48fbfe5 Shane Mc Cormack <shane@dmdirc.com>
            Fix LICENCE file name and add AUTHORS file.

            Gerrit: http://gerrit.dmdirc.com/2651

Change-Id: I267c1cd50e4f97a1d026ca6be4629c3dab707708

modules/util

@@ -1 +1 @@
-Subproject commit b4e4ee1a306073648874f4ea1ab84aa86e2154fa
+Subproject commit 48fbfe50b9e3e1a831d100c7904d39790c06a323