Update dirent.c

GCC14 wants dirent.h included for the function "readdir", "opendir", "closedir" otherwise the compiler will give you the following errors::

1) implicit declaration of function 'opendir'
2) implicit declaration of function 'readdir'
3) implicit declaration of function 'closedir'
4) initialization of 'DIR *' {aka 'struct DIR_ *'} from 'int' makes pointer from integer without a cast 
5) assignment to 'struct dirent *' from 'int' makes pointer from integer without a cast

Author: gordon0001

newlib/libc/sys/vita/dirent.c

@@ -22,7 +22,7 @@ DEALINGS IN THE SOFTWARE.
 
 */
 
-#include <sys/dirent.h>
+#include <dirent.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <malloc.h>