(Corrects paragraph 1 and 9 to say Singapore stocks gained for the sixth straight session, not seventh) * Indonesian rupiah leads losses * Asian equities mixed * Stocks in Malaysia snap three straight sessions of losses By Rishav Chatterjee April 22 (Reuters) - Currencies in emerging Asia were subdued on Tuesday, weighed down by President Donald Trump's renewed criticism of the U.S. Federal Reserve, while Singapore equities extended their winning streak into a sixth straight session. An MSCI index of Asian emerging market equities snapped a three-day streak of gains,...