MT#55283 flush stdout after config print

Otherwise output doesn't appear until exit of process if stdout is fully
buffered.

Change-Id: Ieef30f7d3b5c290992575b616e1c579fbab7b6ad

core/sems.cpp

@@ -424,6 +424,8 @@ int main(int argc, char* argv[])
 #endif
 	 AmConfig::Application.empty() ? "<not set>" : AmConfig::Application.c_str());
 
+  fflush(stdout);
+
   AmConfig::dump_Ifs();
 
   if(set_fd_limit() < 0) {