Ericsson has reached an agreement to acquire Acton, Mass.-based Azuki Systems Inc., a video software maker co-founded by serial entrepreneur Cheng Wu that had raised $36 million in venture funding. Azuki's chairman is Chris Lynch, former CEO of Vertica Systems and a partner at Atlas Venture in Cambridge. Speaking to Xconomy, Lynch termed the acquisition a "good financial deal" for investors and employees. The dollar amount of the deal was not disclosed. Investors in the company included Kepha Partners…