It wasn’t perfect. Or even pretty. But it was enough to snap the longest losing skid in the league. Barely. Brooklyn threw away a 20-point fourth-quarter cushion and needed a last-ditch basket by Michael Porter Jr. to pull out a 112-109 escape against Chicago before a sellout crowd of 17,548 at Barclays Center on Friday night. Porter had a game-high 26 points, including a go-ahead layup with five seconds left. Then the Nets needed a late steal by rookie Drake Powell on Tre Jones to close out