Fix STM32 benchmark endless loop after 1 hour

If the STM32 has an RTC, this is used to time the execution of each
benchmark item. It was only multiplying hours by 24 to get seconds, so
after one hour the amount of seconds went to less than 3600. Therefore
the benchmark thought negative time elapsed and would never end.

Author: LinuxJedi

IDE/STM32Cube/wolfssl_example.c

@@ -1830,7 +1830,7 @@ double current_time(void)
     (void) date;
 
     /* return seconds.milliseconds */
-    return ((double) time.Hours * 24) + ((double) time.Minutes * 60)
+    return ((double) time.Hours * 3600) + ((double) time.Minutes * 60)
             + (double) time.Seconds + ((double) subsec / 1000);
 }
 #endif /* HAL_RTC_MODULE_ENABLED */