[NaCl SDK] nacl_io: seperate socket syscalls into thier own directory.

native_client_sdk/src/libraries/nacl_io/syscalls/hstrerror.c

-/* Copyright 2013 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file. */
-
-#include "nacl_io/ossocket.h"
-
-#ifdef PROVIDES_SOCKET_API
-
-#include <stdio.h>
-
-const char* hstrerror(int err) {
-  switch (err) {
-    case HOST_NOT_FOUND:
-      return "The specified host is unknown.";
-    case NO_ADDRESS:
-      return "The requested name is valid but does not have an IP address.";
-    case NO_RECOVERY:
-      return "A nonrecoverable name server error occurred.";
-    case TRY_AGAIN:
-      return "A temporary error occurred on an authoritative name server. "
-             "Try again later.";
-    case NETDB_INTERNAL:
-      return "Internal error in gethostbyname.";
-  }
-
-  static char rtn[128];
-  snprintf(rtn, sizeof(rtn), "Unknown error in gethostbyname: %d.", err);
-  return rtn;
-}
-
-#endif  /* PROVIDES_SOCKET_API */