[fuchsia] Use 0 instead of the deprecated MX_PORT_OPT_V2 option

runtime/bin/eventhandler_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/eventhandler.h"
@@ skipping 267 matching lines @@
   const uint64_t key = reinterpret_cast<uint64_t>(di);
   di->io_handle()->CancelWait(port_handle, key);
 }
 
 
 EventHandlerImplementation::EventHandlerImplementation()
     : socket_map_(&HashMap::SamePointerValue, 16) {
   shutdown_ = false;
   // Create the port.
   port_handle_ = MX_HANDLE_INVALID;
-  mx_status_t status = mx_port_create(MX_PORT_OPT_V2, &port_handle_);
+  mx_status_t status = mx_port_create(0, &port_handle_);
   if (status != MX_OK) {
     // This is a FATAL because the VM won't work at all if we can't create this
     // port.
     FATAL1("mx_port_create failed: %s\n", mx_status_get_string(status));
   }
   ASSERT(port_handle_ != MX_HANDLE_INVALID);
 }
 
 
 static void DeleteDescriptorInfo(void* info) {
@@ skipping 283 matching lines @@
   // The hashmap does not support keys with value 0.
   return dart::Utils::WordHash(fd + 1);
 }
 
 }  // namespace bin
 }  // namespace dart
 
 #endif  // defined(HOST_OS_FUCHSIA)
 
 #endif  // !defined(DART_IO_DISABLED)