Enable goto_check in goto-analyzer

This was included in the options that goto-analyzer recognises and in its
--help output but they were all silently ignored.  This commit fixes that
so that they are supported, making it more consistent with CBMC (and less
inexplicable).

Author: martin

src/goto-analyzer/goto_analyzer_parse_options.cpp

@@ -906,13 +906,9 @@ bool goto_analyzer_parse_optionst::process_goto_program(
     if(options.get_bool_option("rewrite-union"))
       rewrite_union(goto_model);
 
-#if 0
     // add generic checks
     log.status() << "Generic Property Instrumentation" << messaget::eom;
     goto_check(options, goto_model);
-#else
-    (void)options; // unused parameter
-#endif
 
     // recalculate numbers, etc.
     goto_model.goto_functions.update();