It is a spacecraft. Imagine the suit is getting bigger and bigger. When does it stop being a suit and becomes a spacecraft? Answer: it's a spacecraft all along. It does life support just like the Shuttle and sometimes it also has thrusters.
If the suit does not have a propulsion then it is not a spacecraft? So an EMU+SAFER is a spacecraft but an Orlan is not? I'd say that they are both spacecraft.Only if the astronaut has a MMU with him, that can propell him forward or in any desired direction, then it can be termed as a spacecraft. If its just a person in a suit, then its not a 'spacecraft'. Its a person in a suit.