By Samuel Indyk and Harry Robertson LONDON (Reuters) -Euro zone bond yields extended gains on Friday after data from the United States showed that hiring picked up by slightly more than expected in September. The closely watched non-farm payrolls report showed that the U.S. economy added 263,000 jobs last month, more than the 250,000 economists had been expecting, while the unemployment rate fell to 3.5% from 3.7% in August. U.S. and euro zone bond yields rose as investors took the data as a sign that the Federal Reserve would press on with its aggressive interest rate hikes. By 1505 GMT, Germ…