UPDATE 2-Qatar Islamic Bank plans $549 mln Tier 1 sukuk

* Latest Gulf bank to plan capital-boosting measure* Q4 profit 470 mln riyals, up 30.4 pct* Beats analyst forecasts* Increases dividend to 4.25 riyals per share for 2014(Recasts, adds detail, context)By Tom ArnoldDUBAI, Jan 18 (Reuters) - Qatar Islamic Bank QISB.QA (QIB) plans to raise up to 2 billion riyals ($549.4 million) through a capital-boosting sukuk; the latest Gulf bank eyeing debt market