Add an IRT interface for subzero/compiler to serve_translate_requests.

src/untrusted/irt/irt_pnacl_translator_link.c

 /*
  * Copyright (c) 2015 The Native Client 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 "native_client/src/shared/platform/nacl_log.h"
 #include "native_client/src/shared/srpc/nacl_srpc.h"
 #include "native_client/src/untrusted/irt/irt_dev.h"
 #include "native_client/src/untrusted/irt/irt_interfaces.h"
@@ skipping 30 matching lines @@
   { NULL, NULL },
 };
 
 static void serve_link_request(int (*func)(int nexe_fd,
                                            const int *obj_file_fds,
                                            int obj_file_fd_count)) {
   g_func = func;
   if (!NaClSrpcModuleInit()) {
     NaClLog(LOG_FATAL, "NaClSrpcModuleInit() failed\n");
   }
-  NaClSrpcAcceptClientConnection(srpc_methods);
+  if (!NaClSrpcAcceptClientConnection(srpc_methods)) {
+    NaClLog(LOG_FATAL, "NaClSrpcAcceptClientConnection() failed\n");
+  }
 }
 
 const struct nacl_irt_private_pnacl_translator_link
     nacl_irt_private_pnacl_translator_link = {
   serve_link_request,
 };