Update submodules: installer (new commits)

installer:
    eeacaf4 Shane Mc Cormack <shane@dmdirc.com>
            Fix OS X Dock Icon and Address Bar title. Better handling being launched from within a directory with spaces in it.

            Gerrit: http://gerrit.dmdirc.com/3070

Change-Id: I669f3a6ccf675c472a0dd7ed993e7318bfbb15d6