FastCloneShallowArrayStub should not be used it the length of the array is too big as it could eventually exceed the allowed size limit for manually folded allocations.

R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/300283003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21573 ce2b1a6d-e550-0410-aec6-3dcde31c8c00