[Debug] fix nanos in log timestamp

The timestamp consists of . but the calculation of the nanos in the current minute was broken. A minute are 60 * 10^9 nanoseconds and not 10^9.

This allows a log to be sorted using sed 's/\./ /' <log-file> | sort --key=2 --key=3 -n -o <sorted-log-file>

emper/Debug.cpp

@@ -33,7 +33,7 @@ void emper_add_timestamp_to(std::ostringstream& logMessage) {
 	auto time_since_epoch = now_nanos.time_since_epoch();
 	long time_since_epoch_long = time_since_epoch.count();
 
-	long remaining_nanos = time_since_epoch_long % 1000000000;
+	long remaining_nanos = time_since_epoch_long % 60000000000;
 	logMessage << remaining_nanos;
 }