Change test expectations for test-types/Maybe.

TBR=rossberg@chromium.org
BUG=v8:3840
LOG=N

Review URL: https://codereview.chromium.org/862353002

Cr-Commit-Position: refs/heads/master@{#26212}

test/cctest/cctest.status

@@ -78,6 +78,9 @@
   'test-debug/RecursiveBreakpoints': [PASS, FLAKY],
   'test-debug/RecursiveBreakpointsGlobal': [PASS, FLAKY],
 
+  # BUG(3840). Test fails with some random seeds.
+  'test-types/Maybe': [PASS, FAIL],
+
   ##############################################################################
   # TurboFan compiler failures.