Added inttypes.h include directive in board.h

For now the inttypes.h of the development computer is used.
Which is a bad state. The reason is

It should be fixed by creating a stdint.h in the Baselib, which
defines types like uint32_t, etc., or by entirely replacing the Baselibs
with the newlib.

sam3s_example/include/board.h

@@ -19,6 +19,7 @@
 #include "stdio.h"
 #include "stdlib.h"
 #include "string.h"
+#include "inttypes.h"
 
 #ifdef __GNUC__ 
 #undef __GNUC__