Add test running support for tests generated as pexes.

tests/multiple_sandboxes/nacl.scons

Index: tests/multiple_sandboxes/nacl.scons
diff --git a/tests/multiple_sandboxes/nacl.scons b/tests/multiple_sandboxes/nacl.scons
index 0608158eb07101977587a43a641b83cf52bb51b6..a9246a2c4f9a3dd3851b8194ef256da516997e4c 100644
--- a/tests/multiple_sandboxes/nacl.scons
+++ b/tests/multiple_sandboxes/nacl.scons
@@ -46,11 +46,19 @@ test_prog = env.ComponentProgram(
     'multidomain_test_guest', ['multidomain_test_guest.c'],
     EXTRA_LIBS=['imc_syscalls', '${NONIRT_LIBS}'])
 
+# If we are generating a pexe, translate it first
+extra_deps = []
+if env.Bit('pnacl_stop_with_pexe'):
+  nexe_name, pexe_node = env.GetTranslatedNexe(test_prog)
+  test_prog = nexe_name
+  extra_deps = [pexe_node]
+
 node = env.CommandTest('multidomain_test.out', [runner, test_prog],
                        # Increase verbosity to get more information in
                        # the event of a crash.
                        osenv='NACLVERBOSITY=4',
-                       stdout_golden=env.File('multidomain_test.stdout'))
+                       stdout_golden=env.File('multidomain_test.stdout'),
+                       extra_deps=extra_deps)
 
 # This test does not work everywhere:
 #  * NaCl's ARM sandbox does not support multiple sandboxes per