bump to 1.18.4

as well as fix how we add crio-runc

Signed-off-by: Peter Hunt <haircommander@fedoraproject.org>

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
#
# Date:      Fri Oct 23 17:23:25 2020 +0000
#
# On branch debian-1.18
# Your branch and 'rhcontainer/debian-1.18' have diverged,
# and have 60 and 4 different commits each, respectively.
#   (use "git pull" to merge the remote branch into yours)
#
# Changes to be committed:
#	modified:   .gitignore
#	deleted:    crio.conf.prebuilt
#	modified:   debian/changelog
#	modified:   debian/control
#	deleted:    debian/debhelper-build-stamp
#	modified:   debian/rules
#
# Untracked files:
#	src/
#
