[MIPS] Add remaining parts for building tests for MIPS

tests/mandel/nacl.scons

Index: tests/mandel/nacl.scons
diff --git a/tests/mandel/nacl.scons b/tests/mandel/nacl.scons
index 29f1ff1b0ffa054cccd1497eaef38e8c78e13ca5..6d1286df8979b6c09797356d721e3e253c29bcd3 100644
--- a/tests/mandel/nacl.scons
+++ b/tests/mandel/nacl.scons
@@ -39,6 +39,11 @@ node = env.SelUniversalTest('mandel_test.out',
                             mandel_nexe,
                             stdin=env.File('test.stdin'),
                             stdout_golden=env.File('test.stdout'))
+
+# TODO(petarj): The test hangs indefinitely on QEMU MIPS. Enable it when fixed.
+
 env.AddNodeToTestSuite(node,
                        ['small_tests', 'sel_ldr_tests'],
-                       'run_mandel_test')
+                       'run_mandel_test',
+                       is_broken=env.Bit('target_mips32') and
+                                 env.UsingEmulator())