If procd relaunches the ModemManager daemon after e.g. a crash, we
also want it to notify all cached hotplug events, or otherwise we
would end up leaving the daemon running without the full initial
processing done.

This change modifies the init script to include all the required init
commands as part of the procd instance command, so that procd launches
all of them on every respawn.

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>

The modemmanager.common file includes several utility functions that
are used in several places like the protocol handler and in hotplug
scripts. These utilities should not be installed in /etc as they're
not configuration.

Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>

Signed-off-by: Nicholas Smith <nicholas.smith@telcoantennas.com.au>