Who you gonna call? Apparently, the NYPD. Dan Aykroyd revealed that he and his “Ghostbusters” co-star Bill Murray once stole two “fully equipped” police motorcycles for their impromptu Central Park joyride. Aykroyd, who starred alongside Murray in the hit franchise, said that the pair “appropriated” the bikes from the “Ghostbusters II” set during its 1988-89 shoot and took them for a late-night ride in New York City. “So many adventures over the years,” Aykroyd wrote on Instagram as he celebrated Murray’s 76th birthday Wednesday, sharing two throwback photos of the longtime friends and co-stars. “One night shooting GB2, we appropriated two…