Ashanti Takes 'Say Less' Stand on Ex-BF Nelly's Rape Case

[[tmz:video id="0_wfrvqgo9"]] Ashanti's reaction to her ex-boyfriend Nelly's arrest was short, to the point ... and more than a little self-serving. We got the singer at LAX where our photog made a valiant effort to get Ashanti to talk about Nelly's…