OS: cleanup OS source code version tag

Signed-off-by: Huaqi Fang <578567190@qq.com>

OS/FreeRTOS/Source/portable/GCC/port.c

@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V10.2.1
- * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ * FreeRTOS Kernel V10.3.1
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in

OS/FreeRTOS/Source/portable/GCC/portasm.S

@@ -1,7 +1,7 @@
 
 /*
- * FreeRTOS Kernel V10.2.1
- * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ * FreeRTOS Kernel V10.3.1
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in

OS/FreeRTOS/Source/portable/GCC/portmacro.h

@@ -1,6 +1,6 @@
 /*
- * FreeRTOS Kernel V10.2.1
- * Copyright (C) 2019 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ * FreeRTOS Kernel V10.3.1
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in

OS/UCOSII/arch/os_cpu_a.S

@@ -1,4 +1,3 @@
-/**/
 #include "riscv_encoding.h"
 
 #ifndef __riscv_32e