Hey, Greenpoint’s getting a shiny new park! Alright, technically it’s a “playground,” but with a new skate park, handball court and basketball court, hopefully it’ll make grownups want to come out and play, too. The major overhaul of tired old Sgt. William Dougherty Playground is scheduled to begin late next year, according to Department of Transportation officials, who announced the plans at a Community Board meeting last night.