init: manually set controlling tty for console services

Normally, calling open on a tty will set that tty as the process
group controlling tty if none already exists.  However, if the tty
is /dev/console, the kernel will never automatically set it as the
controlling tty.  Call the TIOCSCTTY manually on the fd, which will
always attempt to set it as the controlling tty.

Fixes ctrl-c on the console shell when androidboot.console is not
passed on the kernel command line and the default /dev/console is
used.

Change-Id: I449cc41b47e93ac38ad6987413bb54131e1ec0cd