[fuchsia] Use 0 instead of the deprecated MX_PORT_OPT_V2 option

runtime/bin/process_fuchsia.cc

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #if !defined(DART_IO_DISABLED)
 
 #include "platform/globals.h"
 #if defined(HOST_OS_FUCHSIA)
 
 #include "bin/process.h"
@@ skipping 484 matching lines @@
   // destructors.
   BufferList out_data;
   BufferList err_data;
   union {
     uint8_t bytes[8];
     int32_t ints[2];
   } exit_code_data;
 
   // Create a port, which is like an epoll() fd on Linux.
   mx_handle_t port;
-  mx_status_t status = mx_port_create(MX_PORT_OPT_V2, &port);
+  mx_status_t status = mx_port_create(0, &port);
   if (status != MX_OK) {
     Log::PrintErr("Process::Wait: mx_port_create failed: %s\n",
                   mx_status_get_string(status));
     return false;
   }
 
   IOHandle* out_tmp = out_iohandle;
   IOHandle* err_tmp = err_iohandle;
   IOHandle* exit_tmp = exit_iohandle;
   const uint64_t out_key = reinterpret_cast<uint64_t>(out_tmp);
@@ skipping 352 matching lines @@
 }
 
 void Process::ClearSignalHandler(intptr_t signal, Dart_Port port) {}
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)
 
 #endif  // !defined(DART_IO_DISABLED)