By Gregor Stuart Hunter and Andrew Silver SINGAPORE/SHANGHAI (Reuters) -Shares of U.S. and European pharmaceutical firms were little changed on Friday, while Asian drugmakers declined, after President Donald Trump announced 100% tariffs on branded drugs imported by firms that are not building plants in the U.S. Analysts said the move was widely expected and unlikely to materially hit the industry, given that most drugmakers have pledged billions of dollars in U.S. manufacturing investments. The condit ...