Update submodules: plugins (new commits)

plugins:
    829a37f Greg Holmes <greg@dmdirc.com>
            Remove broken twitter parser

            Gerrit: http://gerrit.dmdirc.com/2734

Change-Id: I883beb6ab3492270710631d35af332866d3924cc

modules/plugins

@@ -1 +1 @@
-Subproject commit 43969f10d15ce0e00ac2055e75a91f5bf415b804
+Subproject commit 829a37fe1341fe736c1b51fd07488a415a3bbb2d