Merged r16790 into trunk branch.

Set the proper instance-type on HAllocate in BuildFastLiteral

BUG=chromium:284577
R=danno@chromium.org

Review URL: https://codereview.chromium.org/23536065

git-svn-id: https://v8.googlecode.com/svn/trunk@16802 ce2b1a6d-e550-0410-aec6-3dcde31c8c00