Fuchsia: Pass a job to launchpad_create()

runtime/bin/run_vm_tests_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.
 
 #include <fcntl.h>
 #include <launchpad/launchpad.h>
 #include <launchpad/vmo.h>
 #include <magenta/status.h>
 #include <magenta/syscalls.h>
 #include <magenta/syscalls/object.h>
@@ skipping 115 matching lines @@
                             mx_handle_t binary_vmo,
                             int argc,
                             const char* const* argv,
                             int* stdout_out,
                             int* stderr_out) {
   if ((lp_out == NULL) || (stdout_out == NULL) || (stderr_out == NULL)) {
     return ERR_INVALID_ARGS;
   }
   launchpad_t* lp;
   mx_status_t status;
-  status = launchpad_create(0, argv[0], &lp);
+  mx_handle_t job = MX_HANDLE_INVALID;
+  status =
+      mx_handle_duplicate(launchpad_get_mxio_job(), MX_RIGHT_SAME_RIGHTS, &job);
+  RETURN_IF_ERROR(status);
+  status = launchpad_create(job, argv[0], &lp);
   RETURN_IF_ERROR(status);
   status = launchpad_arguments(lp, argc, argv);
   RETURN_IF_ERROR(status);
   status = launchpad_clone_mxio_root(lp);
   RETURN_IF_ERROR(status);
   status = launchpad_add_pipe(lp, stdout_out, 1);
   RETURN_IF_ERROR(status);
   status = launchpad_add_pipe(lp, stderr_out, 2);
   RETURN_IF_ERROR(status);
   status = launchpad_add_vdso_vmo(lp);
@@ skipping 277 matching lines @@
   RETURN_IF_ERROR(status);
 
   // Complain if we didn't try to run all of the tests.
   if (test_list_index != lines_count) {
     fprintf(stderr, "Failed to attempt all the tests!\n");
     fflush(0);
     return -1;
   }
   return 0;
 }