This allows to connect the modem to the Internet with oFono.
I have verified that this does not break anything if the "rmnet0"
network interface is missing. Plus, all mainline devices currently
covered by the package should also be able to use the new "BAM DMUX"
network driver that is used as network interface to the modem.
(Note: This works differently on newer SoCs, but they also need
something different in oFono...)
For some reason, the ModemManager build tends to freeze when built
with QEMU user emulation for arm*. Changing the build to use a single
thread only (-j1) avoids that, although the build is slower of course.
The same thing seems to happen fo oFono as well, so set that to -j1 too.
Also limit building to "armhf armv7 aarch64" since the forks are not
needed on any other architectures, to reduce build times a bit. The
other architectures can just use the upstream packages from Alpine.
Default dbus policy of ofono allows only root user and users who are
logged into tty using at_console policy. However since our dbus is not
built with elogind, at_console is never set.
This allows user in wheel group to access ofono
[ci:skip-build]: already built successfully in CI
