* when OPKGLIBDIR doesn't have the default /var/lib value it will
silently fail to copy package database from normal rootfs to debugfs
rootfs and then when trying to install *-dbg complimentary packages
it won't install anything, because installed_pkgs.txt file generated
from debugfs is empty
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Armin Kuster <akuster808@gmail.com>