Fix signature of __nacl_irt_xx functions

sysdeps/nacl/irt_syscalls.h

 #ifndef _IRT_SYSCALLS_H
 #define _IRT_SYSCALLS_H
 
 #include <sys/types.h>
 #include <sys/epoll.h>
 #include <sys/select.h>
 #include <poll.h>
 #include <stddef.h>
 #include <fcntl.h>
 #include <time.h>
 
 #include <nacl_stat.h>
+#include <nacl_dirent.h>
 
-struct dirent;
-struct nacl_abi_stat;
 struct timeval;
 struct timespec;
 struct sockaddr;
 struct msghdr;
 
 #define socklen_t unsigned int
 
 extern size_t (*__nacl_irt_query)(const char *interface_ident,
                                   void *table, size_t tablesize);
 
@@ skipping 74 matching lines @@
 extern int (*__nacl_irt_close) (int fd);
 extern int (*__nacl_irt_read) (int fd, void *buf, size_t count, size_t *nread);
 extern int (*__nacl_irt_write) (int fd, const void *buf, size_t count,
                                 size_t *nwrote);
 extern int (*__nacl_irt_seek) (int fd, nacl_abi_off_t offset, int whence,
                                nacl_abi_off_t *new_offset);
 extern int (*__nacl_irt_dup) (int fd, int *newfd);
 extern int (*__nacl_irt_dup2) (int fd, int newfd);
 extern int (*__nacl_irt_fstat) (int fd, struct nacl_abi_stat *);
 extern int (*__nacl_irt_stat) (const char *pathname, struct nacl_abi_stat *);
-extern int (*__nacl_irt_getdents) (int fd, struct dirent *, size_t count,
+extern int (*__nacl_irt_getdents) (int fd, struct nacl_abi_dirent *, size_t count,
                                    size_t *nread);
 
 extern int (*__nacl_irt_sysbrk)(void **newbrk);
 extern int (*__nacl_irt_mmap)(void **addr, size_t len, int prot, int flags,
                               int fd, nacl_abi_off_t off);
 extern int (*__nacl_irt_munmap)(void *addr, size_t len);
 extern int (*__nacl_irt_mprotect)(void *addr, size_t len, int prot);
 
 extern int (*__nacl_irt_dyncode_create) (void *dest, const void *src,
                                          size_t size);
@@ skipping 108 matching lines @@
 struct robust_list_head
 {
   void *list;
   long int futex_offset;
   void *list_op_pending;
 };
 #endif
 
 #endif
 #endif