chroot_version_hooks.d: add cros bash completion for old chroots

We added the symlink in new chroots, but still need to migrate
existing ones.

BUG=b:206666477
TEST=`./update_chroot` and now have /etc/bash_completion.d/cros link

Change-Id: I8fb4f835484506e1608e0a06b0ab8f92b927fd53
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosutils/+/3291363
Reviewed-by: Cindy Lin <xcl@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed