some module import/export fixes, and try to do fewer LLVM alloca
some module import/export fixes, and try to do fewer LLVM alloca

toshok/echojs,carlosalberto/echo-js,carlosalberto/echo-js,toshok/echojs,carlosalberto/echo-js,toshok/echojs,toshok/echojs,toshok/echojs,carlosalberto/echo-js,carlosalberto/echo-js,carlosalberto/echo-js,toshok/echojs,toshok/echojs,toshok/echojs