Add Subzero to test scripts.

tests/minnacl/nacl.scons

Index: tests/minnacl/nacl.scons
diff --git a/tests/minnacl/nacl.scons b/tests/minnacl/nacl.scons
index 042d742ff72b737a261d2a79133433ef47ed7091..23d45a2436e3e40529caed21d30663def6e0ed56 100644
--- a/tests/minnacl/nacl.scons
+++ b/tests/minnacl/nacl.scons
@@ -39,6 +39,11 @@ env.Replace(TRANSLATEFLAGS=['-nostdlib'])
 # the sandboxed translator.
 if env.Bit('use_sandboxed_translator'):
   Return()
+# TODO(stichnot,jvoung): For this special minimal-code test (see comment above),
+# linking the Subzero generated ELF file results in a nexe that fails
+# validation.  https://code.google.com/p/nativeclient/issues/detail?id=4134
+if env.Bit('use_sz'):
+  Return()
 test_prog = env.GetTranslatedNexe(test_prog)
 
 is_broken = not env.Bit('nacl_static_link')