ltlsynt: support multiple --tlsf options

* bin/common_finput.cc, bin/common_finput.hh: Add support for
process_tlsf_file.
* bin/ltlsynt.cc: Implement it.
* tests/core/syfco.test: Adjust test case.

bin/common_finput.hh

@@ -27,7 +27,8 @@
 
 enum class job_type : char { LTL_STRING,
                              LTL_FILENAME,
-                             AUT_FILENAME };
+                             AUT_FILENAME,
+                             TLSF_FILENAME };
 
 struct job
 {
@@ -77,6 +78,9 @@ public:
   virtual int
   process_aut_file(const char* filename);
 
+  virtual int
+  process_tlsf_file(const char* filename);
+
   virtual int
   run();