UPDATE 1-Singapore June exports up 3.2 pct on May, but worries persist

* June non-oil exports +3.2 pct m/m vs -1.1 pct in May* June non-oil exports -8.8 pct y/y vs -4.6 pct in May* Barclays says Q2 GDP growth may be revised downwardsBy Kevin LimSINGAPORE, July 17 (Reuters) – Singapore’s non-oil exports rose a seasonally adjusted 3.2 percent in June,...UPDATE 1-Singapore June exports up 3.2 pct on May, but worries persist