Skip some tests with TF on gc stress.

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/652193007

Cr-Commit-Position: refs/heads/master@{#24985}
git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24985 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -234,6 +234,8 @@
   'regress/regress-91008': [PASS, NO_VARIANTS],
   'compiler/osr-regress-max-locals': [PASS, NO_VARIANTS],
   'math-floor-of-div': [PASS, NO_VARIANTS],
+  'unicodelctest': [PASS, NO_VARIANTS],
+  'unicodelctest-no-optimization': [PASS, NO_VARIANTS],
 }],  # 'gc_stress == True'
 
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