Update submodules: plugins (new commits)

plugins:
    e5c43eb Chris Smith <chris@dmdirc.com>
            Fix silly dependencies in the RelayBotPlugin.

            Gerrit: http://gerrit.dmdirc.com/2672

Change-Id: I67262e59513108a2b9728712bcae85f3e0775c41

modules/plugins

@@ -1 +1 @@
-Subproject commit 84f6e25645b8f6fce63e029c2c40d3afff3266eb
+Subproject commit e5c43ebf2ddb7fcca4b2c6d520582b33844e93f3