[rilmodem][WIP] Introducing skeleton implementation for phonebook

Enables implementation of phonebook support in Rilmodem

Signed-off-by: jussi.kangas@tieto.com
Merge pull request #11 from jkangas/master

Request for enabling phonebook implementation main in branch
Merge pull request #12 from marttipiirainen/master

Enabled conference calls, and hold/resume
[rilmodem][WIP] Introducing basic phonebook functionality

Brings basic phonebook support to Rilmodem. Reads ADN content to
phone memory

Signed-off-by: jussi.kangas@tieto.com
Merge pull request #13 from jkangas/master

Request for bringing basic phonebook implementation to main branch
[rilmodem][WIP] USSD (Unstructured Supplementary Service Data) functionality

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>
Merge branch 'master' of https://github.com/marttipiirainen/ofono

Conflicts:
	ofono/Makefile.am
	ofono/drivers/rilmodem/rilmodem.c

Signed-off-by: Martti Piirainen <martti.piirainen@tieto.com>