Include string.h at the top of portable/GCC/ARM_CA9/port.c to prevent memset() generating a warning. (#430)

Co-authored-by: none <unknown>
diff --git a/portable/GCC/ARM_CA9/port.c b/portable/GCC/ARM_CA9/port.c
index 78c8aea..6dbccf3 100644
--- a/portable/GCC/ARM_CA9/port.c
+++ b/portable/GCC/ARM_CA9/port.c
@@ -28,6 +28,7 @@
 

 /* Standard includes. */

 #include <stdlib.h>

+#include <string.h>

 

 /* Scheduler includes. */

 #include "FreeRTOS.h"