Non-SFI mode: Implement nacl_irt_random only for nacl_helper_nonsfi.

SConstruct

 #! -*- python -*-
 # Copyright (c) 2012 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.
 
 import atexit
 import json
 import os
 import platform
 import re
@@ skipping 681 matching lines @@
     'run_fork_test',
     'run_getpid_test',
     'run_hello_world_test',
     'run_irt_futex_test',
     'run_malloc_realloc_calloc_free_test',
     'run_mmap_test',
     'run_nanosleep_test',
     'run_prctl_test',
     'run_printf_test',
     'run_pwrite_test',
+    'run_random_test',
     'run_sigaction_test',
     'run_signal_sigbus_test',
     'run_signal_test',
     'run_socket_test',
     'run_stack_alignment_test',
     'run_syscall_test',
     'run_thread_test',
     ])
 
 
@@ skipping 3336 matching lines @@
   nacl_env.ValidateSdk()
 
 if BROKEN_TEST_COUNT > 0:
   msg = "There are %d broken tests." % BROKEN_TEST_COUNT
   if GetOption('brief_comstr'):
     msg += " Add --verbose to the command line for more information."
   print msg
 
 # separate warnings from actual build output
 Banner('B U I L D - O U T P U T:')