The Indianapolis Speedrome, which enjoyed a comeback year in 2017 under new ownership and after a major renovation, has signed naming-rights deals with two sponsors, track officials announced Thursday.   The 76-year-old east-side short track will now be called the "Tom Wood Group Indianapolis Speedrome powered by Lincoln Tech" as part of the sponsorship agreements.   Financial terms of the deals were not disclosed, but track president and general manager Jonathan Byrd II said the contracts were for two years and in the mid-five-figure dollar range. The sponsors have options to extend the agreements.