Fix signature of __nacl_irt_xx functions

sysdeps/nacl/irt_syscalls.c

 #include <string.h>
 #include <sys/stat.h>
 #include <time.h>
 #include <nacl_stat.h>
 #include <nacl_syscalls.h>
 #define stat nacl_abi_stat
 #include <irt.h>
 #include <irt_dev.h>
 #undef stat
 #include <irt_syscalls.h>
@@ skipping 84 matching lines @@
 }
 
 static int nacl_irt_fstat (int fd, struct nacl_abi_stat *st) {
   return -NACL_SYSCALL (fstat) (fd, st);
 }
 
 static int nacl_irt_stat (const char *pathname, struct nacl_abi_stat *st) {
   return -NACL_SYSCALL (stat) (pathname, st);
 }
 
-static int nacl_irt_getdents (int fd, struct dirent *buf, size_t count,
+static int nacl_irt_getdents (int fd, struct nacl_irt_dirent *buf, size_t count,
                               size_t *nread) {
   int rv = NACL_SYSCALL (getdents) (fd, buf, count);
   if (rv < 0)
     return -rv;
   *nread = rv;
   return 0;
 }
 
 static int nacl_irt_sysbrk (void **newbrk) {
   /*
@@ skipping 187 matching lines @@
                         int *newfd);
 int (*__nacl_irt_close) (int fd);
 int (*__nacl_irt_read) (int fd, void *buf, size_t count, size_t *nread);
 int (*__nacl_irt_write) (int fd, const void *buf, size_t count,
                          size_t *nwrote);
 int (*__nacl_irt_seek) (int fd, off_t offset, int whence, off_t *new_offset);
 int (*__nacl_irt_dup) (int fd, int *newfd);
 int (*__nacl_irt_dup2) (int fd, int newfd);
 int (*__nacl_irt_fstat) (int fd, struct nacl_abi_stat *);
 int (*__nacl_irt_stat) (const char *pathname, struct nacl_abi_stat *);
-int (*__nacl_irt_getdents) (int fd, struct dirent *, size_t count,
+int (*__nacl_irt_getdents) (int fd, struct nacl_abi_dirent *, size_t count,
                             size_t *nread);
 int (*__nacl_irt_socket) (int domain, int type, int protocol, int *sd);
 int (*__nacl_irt_accept) (int sockfd, struct sockaddr *addr,
                           socklen_t *addrlen, int *sd);
 int (*__nacl_irt_bind) (int sockfd, const struct sockaddr *addr,
                         socklen_t addrlen);
 int (*__nacl_irt_listen) (int sockfd, int backlog);
 int (*__nacl_irt_connect) (int sockfd, const struct sockaddr *addr,
                            socklen_t addrlen);
 int (*__nacl_irt_send) (int sockfd, const void *buf, size_t len, int flags,
@@ skipping 457 matching lines @@
   __nacl_irt_getsockopt = not_implemented;
   __nacl_irt_setsockopt = not_implemented;
   __nacl_irt_socketpair = not_implemented;
   __nacl_irt_shutdown = not_implemented;
 }
 
 size_t nacl_interface_query(const char *interface_ident,
                             void *table, size_t tablesize) {
   return (*__nacl_irt_query)(interface_ident, table, tablesize);
 }