lxc-alpine: mount tmpfs on /dev/shm

Signed-off-by: Kaarle Ritvanen <kaarle.ritvanen@datakunkku.fi>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
lxc-monitord.log should not be created with mode 0666

lxc_monitord_spawn() in src/lxc/monitor.c contained "umask(0);", and
because of this, lxc-monitord created lxc-monitord.log with mode 0666.
World-writeable log files are bad, so remove this umask(0).

Signed-off-by: Robert Vogelgesang <vogel@users.sourceforge.net>
Acked-by: Dwight Engen <dwight.engen@oracle.com>
Acked-by: Stéphane Graber <stgraber@ubuntu.com>
ubuntu/ubuntu-cloud: Add support for arm64 and ppc64el

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>