Blacklist mjsunit/compare-known-objects-slow as well.

R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/602373002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24249 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/mjsunit.status

@@ -70,9 +70,10 @@
   'harmony/block-let-crankshaft': [PASS, NO_VARIANTS],
   'harmony/empty-for': [PASS, NO_VARIANTS],
 
-  # Some tests are over-restrictive about object layout.
+  # TODO(verwaest): Some tests are over-restrictive about object layout.
   'array-constructor-feedback': [PASS, NO_VARIANTS],
   'array-feedback': [PASS, NO_VARIANTS],
+  'compare-known-objects-slow': [PASS, NO_VARIANTS],
   'elements-kind': [PASS, NO_VARIANTS],
 
   # Some tests are just too slow to run for now.