Fix bugs in DeoptimizeIf when lazy deopt is requested.

This also implements --trap-on-deopt on x64 and simplifies the
implementation of this flag on all architectures.

R=danno@chromium.org

Review URL: https://codereview.chromium.org/12223053

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@13633 ce2b1a6d-e550-0410-aec6-3dcde31c8c00