Add test running support for tests generated as pexes.

tests/minnacl/nacl.scons

Index: tests/minnacl/nacl.scons
diff --git a/tests/minnacl/nacl.scons b/tests/minnacl/nacl.scons
index 9436c9ed01dda4e40b3311e77e650d358a183861..56257eebab4ea65106f98a147691b62be793443b 100644
--- a/tests/minnacl/nacl.scons
+++ b/tests/minnacl/nacl.scons
@@ -52,12 +52,20 @@ test_prog = env.ComponentProgram(
     ['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'))