tools: fix getty configuration in create-image.sh
tools: fix getty configuration in create-image.sh

create-image.sh adds the string "V0:23:respawn:/sbin/getty 115200 hvc0" to inittab
of a virtual machine, but a fresh debian-wheezy doesn't have a hvc0 device.
So getty fails to start and respawns over and over again:
  INIT: Id "V0" respawning too fast: disabled for 5 minutes

Let's fix create-image.sh to have a working VM terminal.

Signed-off-by: Alexander Popov <71451045b2a052d98f871b4d58b124c139833139@linux.com>

hyz0906/syzkaller,zoulasc/syzkaller,google/syzkaller,xairy/syzkaller,dotweiba/syzkaller,xairy/syzkaller,zoulasc/syzkaller,xairy/syzkaller,google/syzkaller,hyz0906/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller,google/syzkaller,google/syzkaller,dotweiba/syzkaller,google/syzkaller,zoulasc/syzkaller,xairy/syzkaller,hyz0906/syzkaller,zoulasc/syzkaller,google/syzkaller,google/syzkaller,dotweiba/syzkaller,hyz0906/syzkaller,xairy/syzkaller,xairy/syzkaller,xairy/syzkaller