plugins: Plugin for finding MNC length from IMSI

This plugin finds the MNC length from the IMSI using the valid MCC/MNC
pairs published by the ITU-T.
include: MNC length from IMSI driver interface
src: Auxiliar functions for MNC length plugins
[ofono] Add MNC plugin changes from Canonical

Signed-off-by: Miia Leinonen <miia.leinonen@oss.tieto.com>
build: Added mnclenght plugin and driver
Merged Canonical MNC plugin

Conflicts:
	ofono/Makefile.am
Fixed memory leak in provision_get_settings
Merge pull request #126 from jkangas/new-ofono

Request for pulling Canonical MNC plugin and provision memory leak fix to next branch
Merge pull request #125 from jpoutiai/next

remove multiple watchers
[ofono] Handle gril ioconnection shutdown by exit

Before: gril connection hand up (G_IO_HUP) causes ofono gril
to shutdown and no messages are handled.
After: gril notifies ril plugin which emits a message
to clients and exits ofono.

Signed-off-by: Tommi Kenakkala <tommi.kenakkala@oss.tieto.com>
[rilmodem] Do not close the ofono if rild dies

There is no need to kill ofono if connection to rild dies. We just
need to inform client about connection drop and try again

Signed-off-by: Jussi Kangas <jussi.kangas@oss.tieto.com>
Merge pull request #127 from tkenakka/next

Next: Handle 1) gril connect fail at startup 2) gril hangup when already up
[sim]recommit id:e2f46ce868fec8c797545de851f91f78a85226a2

Signed-off-by: Jarko Poutiainen <Jarko.Poutiainen@oss.tieto.com>