[arm] Use single instruction tail call sequence.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/107813003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18426 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
[arm] Avoid unnecessary branches in array constructor stubs.

R=ulan@chromium.org

Review URL: https://codereview.chromium.org/113863002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18427 ce2b1a6d-e550-0410-aec6-3dcde31c8c00