Update submodules: plugins (new commits)

plugins:
    fb671d2 Chris Smith <chris@dmdirc.com>
            Give the NickColourPlugin a ColourManager.

            Gerrit: http://gerrit.dmdirc.com/2774

Change-Id: If04be786f7bf91c1eb170fee4922b1973c0f6e14

modules/plugins

@@ -1 +1 @@
-Subproject commit 82065e9191164ebe873cb72b1fb2d394b5b18edb
+Subproject commit fb671d2ef799c77009d3be4444481c74c4d63220