MIDEAST STOCKS-Arabtec drags down Dubai index, local sugar revival boosts Egypt food makers

* Arabtec tanks by daily limit on massive Q4 net loss * Gulf Navigation drops despite stronger net profit * Abu Dhabi's Eshraq Properties slumps after swinging to net loss * Saudi's Alhokair up on appointment of new chief executive * Egypt's Juhayna, Domty up on news of new local sugar facility DUBAI, Feb 13 (Reuters) - A slump in shares of Dubai's Arabtec dragged Dubai's stock market lower on Monday after the builder reported a larger fourth-quarter net loss, while other markets were mixed. Dub