build-setup.sh: only delete ubuntu user when present
A previous commit (58ad8018e), added code to delete the new "ubuntu"
user in the more recent ubuntu distributions. Unfortunately that
introduces an issue if someone is using an older ubuntu distribution.
The new "ubuntu" user is not present so the delete command fails:
```
"userdel: user 'ubuntu' does not exist"
```
Only delete the user if it's present in the image.
Tested:
- Confirmed script works on old and new ubuntu containers
Change-Id: I9ea89cd82d7ae6d71271ec59aac8cdf98bfca7c2
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
1 file changed