bin: use common_aoutput in ltl2tgba

* src/bin/common_aoutput.hh, src/bin/common_aoutput.cc: Adjust to
support three kind of statistics printer, depending on whether the
tool input formulas, automata, or nothing.
* src/bin/randaut.cc, src/bin/autfilt.cc: Adjust.
* src/bin/ltl2tgba.cc: Use the common_aoutput printers.  The
--csv-escape option disappeared along the way, but it was not honored
anyway...

src/bin/randaut.cc

@@ -298,7 +298,8 @@ main(int argc, char** argv)
 
       auto runtime = sw.stop();
 
-      printer.print(aut, opt_seed_str, automaton_num, runtime, nullptr);
+      printer.print(aut, nullptr,
+		    opt_seed_str, automaton_num, runtime, nullptr);
 
       ++automaton_num;
       if (opt_automata > 0 && automaton_num >= opt_automata)