ltp: add acl, attr, curl and util-linux runtime dependencies
* Use a list and re-order alphabetically to make it easier to read and
update.
* Add missing runtime dependencies:
- acl (getfacl/setfacl commands are required)
- attr (getfattr/setfattr commands are required)
- iproute2 (required for netns tests)
- curl (curl command is required)
- util-linux (ipcs command is required)
