Add test running support for tests generated as pexes.

tests/minnacl/nacl.scons

 # -*- python -*-
 # Copyright 2011 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('env')
 
 # valgrind has problems with minimal_test_guest
 if env.IsRunningUnderValgrind():
   Return()
@@ skipping 34 matching lines @@
                 'platform_qual_lib',
                 'gio',
                 ] + VALIDATOR_LIBS)
 
 
 test_prog = env.ComponentProgram(
     'minimal_test_guest',
     ['minimal_test_guest.c'],
     EXTRA_LINKFLAGS=['-nostdlib'])
 
+extra_deps = []

[Mark Seaborn, 2012/03/13 22:16:55]

What's with this extra_deps when SCons will track dependencies automatically
when you use target objects?

+if env.Bit('pnacl_stop_with_pexe'):
+  env.Replace(TRANSLATEFLAGS=['-nostdlib'])
+  nexe_name, pexe_node = env.GetTranslatedNexe(test_prog)
+  test_prog = nexe_name
+  extra_deps = [pexe_node]
+
 test_command = [runner, test_prog]
 bootstrap, _ = env.GetBootstrap()
 if bootstrap is not None:
   test_command = [bootstrap] + test_command
 
 node = env.CommandTest('minimal_test.out', test_command,
-                       stdout_golden=env.File('minimal_test.stdout'))
+                       stdout_golden=env.File('minimal_test.stdout'),
+                       extra_deps=extra_deps)
 env.AddNodeToTestSuite(node, ['small_tests'], 'run_minnacl_test',
                        is_broken=not env.Bit('nacl_static_link'))