A bug in AllocationSite::GetMode(from, to) meant that we didn't update
boilerplates for SMI to SMI_HOLEY transitions.

BUG=
R=verwaest@chromium.org

Review URL: https://codereview.chromium.org/18917003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15617 ce2b1a6d-e550-0410-aec6-3dcde31c8c00