June 20 (Reuters) - The following bids, mergers, acquisitions and disposals were reported by 1030 GMT on Friday: ** German consumer electronics retailer Ceconomy has agreed to swap its Russian business and cash for a 15 percent stake in M.video, a unit of Russia's Safmar, it said. ** German sportscar maker Porsche said it was taking a 10 percent stake in Rimac Automobili, a Croatian start-up sportscar manufacturer which has developed a battery-powered car capable of accelerating to 400 kilometer