[Sheriff] Temporarily mark array-literal-feedback as flaky for GC stress.

The test is blocking the v8 lkgr. It will be unmarked again after there is infrastructure to disable it on GC stress only.

BUG=
TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/143463004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18700 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -109,6 +109,7 @@
   # to disable these tests on GC stress.
   'elements-kind': [PASS, ['mode == debug and system == linux', FLAKY]],
   'osr-elements-kind': [PASS, ['mode == debug and system == linux', FLAKY]],
+  'array-literal-feedback': [PASS, ['mode == debug and system == linux', FLAKY]],
 }],  # ALWAYS
 
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