basic-fixes: Tweak tmpfiles.d/provision.conf

As a followup for CentOS#371
this PR tweaks `tmpfiles.d/provision.conf` so
that there is only a single /var/roothome line for tmpfiles.d

As it is both provision.conf and rpm-ostree-0-integration.conf
define the same dir.

This should fix containers/bootc#358

tier-0/basic-fixes.yaml

@@ -24,3 +24,6 @@ postprocess:
  # work if we want to use tmpfiles.d to write to `/root/.ssh` because
  # tmpfiles gives up on that before getting to `/var/roothome`.
  sed -ie 's, /root, /var/roothome,' /usr/lib/tmpfiles.d/provision.conf
+ # Because /var/roothome is also defined in rpm-ostree-0-integration.conf
+ # we need to delete /var/roothome
+ sed -ie '/^d- \/var\/roothome /d' /usr/lib/tmpfiles.d/provision.conf