TAMPERE, Finland, April 15 (Reuters) - Mobile handset makers like LG Electronics 005930.KS are moving toward adopting Linux-based MeeGo operating systems after Nokia NOK1V.HE abandoned it and opened the way for rivals, one of the project's leaders said. Open-source MeeGo was created last year by the merger of Nokia and Intel's INTC.O Linux-based platforms, but Nokia pulled back from the project in