By Caroline Valetkevitch NEW YORK (Reuters) - U.S. stocks ended higher on Friday after mostly in-line U.S. inflation data, but the three major indexes posted losses for the week. The S&P 500 and Nasdaq snapped three-week streaks of weekly gains. The Commerce Department's personal consumption expenditures index report for August showed inflation behaving as expected while personal income and consumer spending surprised to the upside. Prices rose by 0.3% last month, and by 2.7% year-over-year, hitting the ...