msp430_GCC: Make interrupts return void (#1146)

If a return type of a function is not specified, it defaults to int. Set
the return type of interrupts to void to avoid warnings.

FreeRTOS/Demo/msp430_GCC/serial/serial.c

@@ -1,6 +1,6 @@
 /*
  * FreeRTOS V202212.00
- * Copyright (C) 2020 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
+ * 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
@@ -60,8 +60,8 @@ static QueueHandle_t xCharsForTx;
 static volatile short sTHREEmpty;
 
 /* Interrupt service routines. */
-interrupt (UART1RX_VECTOR) wakeup vRxISR( void );
-interrupt (UART1TX_VECTOR) wakeup vTxISR( void );
+interrupt (USART1RX_VECTOR) wakeup void vRxISR( void );
+interrupt (USART1TX_VECTOR) wakeup void vTxISR( void );
 
 /*-----------------------------------------------------------*/
 
@@ -185,7 +185,7 @@ signed portBASE_TYPE xReturn;
 /*
  * UART RX interrupt service routine.
  */
-interrupt (UART1RX_VECTOR) wakeup vRxISR( void )
+interrupt (USART1RX_VECTOR) wakeup void vRxISR( void )
 {
 signed char cChar;
 portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
@@ -209,7 +209,7 @@ portBASE_TYPE xHigherPriorityTaskWoken = pdFALSE;
 /*
  * UART Tx interrupt service routine.
  */
-interrupt (UART1TX_VECTOR) wakeup vTxISR( void )
+interrupt (USART1TX_VECTOR) wakeup void vTxISR( void )
 {
 signed char cChar;
 portBASE_TYPE xTaskWoken = pdFALSE;

manifest.yml

@@ -5,7 +5,7 @@ license: "MIT"
 
 dependencies:
   - name: "FreeRTOS-Kernel"
-    version: "bd0f87c18"
+    version: "ca907b445"
     repository:
       type: "git"
       url: "https://github.com/FreeRTOS/FreeRTOS-Kernel.git"