Tag smi-constants as smi. This also fixes code that copies holes into arrays.

BUG=
R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15861009

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14814 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Fix build

R=jkummerow@chromium.org

Review URL: https://chromiumcodereview.appspot.com/15881004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14815 ce2b1a6d-e550-0410-aec6-3dcde31c8c00