Warnings: Ensure death functions are all marked noreturn

Utilities/Thread.cpp

@@ -2389,7 +2389,7 @@ u64 thread_base::get_cycles()
 	}
 }
 
-void thread_ctrl::emergency_exit(std::string_view reason)
+[[noreturn]] void thread_ctrl::emergency_exit(std::string_view reason)
 {
 	sig_log.fatal("Thread terminated due to fatal error: %s", reason);