If it's a language requirement, then see if your language allows bare LFs. If so, it's one byte. If your language requires CRLF (I think batch files do? Haven't checked), then you have to include both.
Remember, the principle is that you have to make the smallest valid program that does the task. The same principle governs how much whitespace needs to be counted: as little whitespace as is required to make the program valid and behave according to spec.
(Some people make bogus rules like "whitespace characters don't count towards the code size"; for such contests, any submission in Whitespace is guaranteed to be shortest.)