sept: add missing include

sept/sept-secondary/src/exception_handlers.c

@@ -19,6 +19,7 @@
 #include "exception_handlers.h"
 #include "utils.h"
 #include "lib/log.h"
+#include "lib/vsprintf.h"
 
 #define CODE_DUMP_SIZE      0x30
 #define STACK_DUMP_SIZE     0x30