Blacklist computed property name failures with TurboFan.

R=verwaest@chromium.org
TEST=mjsunit/harmony/computed-property-names

Review URL: https://codereview.chromium.org/862513002

Cr-Commit-Position: refs/heads/master@{#26135}

test/mjsunit/mjsunit.status

@@ -84,6 +84,12 @@
   # not work, but we expect it to not crash.
   'debug-step-turbofan': [PASS, FAIL],
 
+  # TODO(mstarzinger): Investigate failures with computed property names.
+  # Note that this happens in GC-stress mode only.
+  'harmony/computed-property-names': [PASS, NO_VARIANTS],
+  'harmony/computed-property-names-classes': [PASS, NO_VARIANTS],
+  'harmony/computed-property-names-object-literals-methods': [PASS, NO_VARIANTS],
+
   # TODO(jarin/mstarzinger): Investigate debugger issues with TurboFan.
   'debug-evaluate-const': [PASS, NO_VARIANTS],
   'debug-evaluate-locals': [PASS, NO_VARIANTS],