Update gr.m3u

Added 2 channels

channels/gr.m3u

@@ -143,3 +143,7 @@ http://live.streams.ovh:1935/tvcreta/tvcreta/playlist.m3u8
 http://erato.multiserver.gr:1935/imp/imp/playlist.m3u8
 #EXTINF:-1 tvg-id="" tvg-name="" tvg-logo="https://i.imgur.com/OnB6n3C.jpg" group-title="Local",Μεσογειος TV
 http://176.9.123.140:1935/mesogeiostv/stream/master.m3u8
+#EXTINF:-1 tvg-id="" tvg-name="" tvg-logo="http://greektv.pbworks.com/f/CORFU_TV.png" group-title="",Corfu TV
+https://itv.streams.ovh/corfuchannel/corfuchannel/playlist.m3u8
+#EXTINF:-1 tvg-id="" tvg-name="" tvg-logo="http://i.imgur.com/nwInqes.png" group-title="",Messinia Web TV
+http://176.9.123.140:1935/messinia/messinia/master.m3u8