salut_file_transfer_channel_constructor: add a debug msg telling some info about the FT
salut_file_transfer_channel_constructor: add a debug msg telling some info about the FT

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut