libtracker-miner: Do not leak the TrackerSparqlConnection

https://bugzilla.gnome.org/show_bug.cgi?id=725890
libtracker-fts: Free the list

https://bugzilla.gnome.org/show_bug.cgi?id=725890
miner-fs: Do not leak the UpDevice

https://bugzilla.gnome.org/show_bug.cgi?id=725890