mips64 patch from Atsushi Nemoto

This is a bit twisted dirent.h can be used for both getdirent and
getdirent64 case on mips/mips64.

libc/sysdeps/linux/mips/bits/dirent.h

@@ -0,0 +1,61 @@
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _DIRENT_H
+# error "Never use <bits/dirent.h> directly; include <dirent.h> instead."
+#endif
+#include <errno.h>
+#include <sys/syscall.h>
+
+struct dirent
+  {
+#if defined(__USE_FILE_OFFSET64) && defined(__NR_getdents64)
+    __ino64_t d_ino;
+    __off64_t d_off;
+#else
+    __ino_t d_ino;
+    __off_t d_off;
+#endif
+    unsigned short int d_reclen;
+    unsigned char d_type;
+    char d_name[256];		/* We must not include limits.h! */
+  };
+
+#ifdef __USE_LARGEFILE64
+struct dirent64
+  {
+#ifdef __NR_getdents64
+    __ino64_t d_ino;
+    __off64_t d_off;
+#else
+    /* dirent64 is the same as dirent.  */
+    __ino_t d_ino;
+    __off_t d_off;
+#endif
+    unsigned short int d_reclen;
+    unsigned char d_type;
+    char d_name[256];		/* We must not include limits.h! */
+  };
+#endif
+
+#define d_fileno	d_ino	/* Backwards compatibility.  */
+
+#undef  _DIRENT_HAVE_D_NAMLEN
+#define _DIRENT_HAVE_D_RECLEN
+#define _DIRENT_HAVE_D_OFF
+#define _DIRENT_HAVE_D_TYPE