Update submodules: plugins (new commits)

plugins:
    b48ad26 Chris Smith <chris@dmdirc.com>
            Fix some ugly logic.

            Gerrit: http://gerrit.dmdirc.com/2951

Change-Id: I3b5d67f5f1b42cc1b42e5988301891843d77f145

modules/plugins

@@ -1 +1 @@
-Subproject commit 5138fca86e169716d1f12a836bc04cf9db128012
+Subproject commit b48ad26572c90e43db42d10108fb4bc973ee1758