Skip webkit/array-iterate-backwards for TF.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/672113002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24817 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/webkit/webkit.status

@@ -48,6 +48,7 @@
 ['simulator', {
   # Skip tests that timeout with turbofan.
   'dfg-int-overflow-in-loop': [PASS, NO_VARIANTS],
+  'array-iterate-backwards': [PASS, NO_VARIANTS],
   'function-apply-aliased': [SKIP],
 }],  # 'simulator'
 ['arch == arm64 and simulator_run == True', {