[MIPS] Add remaining parts for building tests for MIPS

tests/barebones/nacl.scons

Index: tests/barebones/nacl.scons
diff --git a/tests/barebones/nacl.scons b/tests/barebones/nacl.scons
index eede92149149e9add4e88e4643d6ffab100e76e9..aa7ad980c53242cea29c73a8b701aece95d35f8f 100644
--- a/tests/barebones/nacl.scons
+++ b/tests/barebones/nacl.scons
@@ -59,6 +59,8 @@ for basename in barebones_tests:
   # NOTE: we avoid using zero as the "good" exit status and just
   #       arbitrarily picked 55. All tests are coded to follow this model.
   node = env.CommandSelLdrTestNacl(out, nexe, exit_status='55')
+  if env.Bit('target_mips32'):
+    env.AddBiasForPNaCl()
 
   env.AddNodeToTestSuite(node,
                          ['small_tests', 'sel_ldr_tests', 'barebones_tests'],