Merged r17441 into 3.21 branch.

Fix uint32-to-smi conversion in Lithium

BUG=chromium:309623
R=yangguo@chromium.org

Review URL: https://codereview.chromium.org/66783007

git-svn-id: http://v8.googlecode.com/svn/branches/3.21@17652 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
12 files changed