Do not create mount file for /acct

This is done automatically by systemd and currently this line causes
following warning in journal:

Mar 10 05:21:13 Jolla mount[370]: mount: none is already mounted or
/acct busy

Signed-off-by: Marko Saukko <marko.saukko@jolla.com>
Do not install init-debug by default but use the default init processes.

init-debug bypasses lots of the default init process things and it
should not be installed by default. If someone needs to debug init then
this should be installed manually to the filesystem for more debugging.

Signed-off-by: Marko Saukko <marko.saukko@jolla.com>