LONDON (Reuters) - Oil prices steadied on Friday, on track for a weekly gain, with attention focused on a speech by U.S. Federal Reserve chief Jerome Powell for news on whether it will cut interest rates for a second time this year to boost the world's largest economy.Brent crude futures , the international benchmark for oil prices, fell 4 cents to $59.88 a barrel by 0813 GMT but was up about 2.1% on the week.U.S. West Texas Intermediate (WTI) crude futures slipped by 5 cents to $55.30, up 0.8%..