Add basic structure for fuzzing targets

General changes:

* Add -D/--deterministic command line option as
  convenience/alternative to -G/--load-seeds (i.e. no file needed, it just
  uses zero-initialized random seeds).  It also changes Broker data
  stores over to using deterministic timing rather than real time.

* Add option to make Reporter abort on runtime scripting errors

src/Options.h

@@ -53,6 +53,8 @@ struct Options {
 	bool debug_scripts = false;
 	bool perftools_check_leaks = false;
 	bool perftools_profile = false;
+	bool deterministic_mode = false;
+	bool abort_on_scripting_errors = false;
 
 	bool run_unit_tests = false;
 	std::vector<std::string> doctest_args;