SetProperty for UseDeliveryReports

[Pasi Miettinen]

These patches implement the setting of UseDeliveryReports variable
via DBus.

Patches include:
1. Setting of SRR according to UseDeliveryReports in
   sms_text_prepare().
2. Add new parameter to sms_text_prepare calls in test-sms.c.
3. SMS core changes.
4. Changes for send-sms script. If the third parameter for the
   script is "1", UseDeliveryReports is set to TRUE and the
   message is sent.