configure.ac: add HAVE_TP_SMS_CHANNEL
configure.ac: add HAVE_TP_SMS_CHANNEL

Check for telepathy-glib version supporting SMSChannel property on
Channel.Interface.SMS.

maemo-foss/meego-cellular-telepathy-ring,freedesktop-unofficial-mirror/telepathy__telepathy-ring,matthewvogt/telepathy-ring,jpoutiai/telepathy-ring,maemo-foss/meego-cellular-telepathy-ring,maemo-foss/meego-cellular-telepathy-ring,matthewvogt/telepathy-ring,jpoutiai/telepathy-ring,freedesktop-unofficial-mirror/telepathy__telepathy-ring,matthewvogt/telepathy-ring,freedesktop-unofficial-mirror/telepathy__telepathy-ring,jpoutiai/telepathy-ring