[turbofan] Use cbz/cbnz when possible on arm64.

R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/715433004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25288 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Correctly compute line numbers in functions from the function constructor.

R=aandrey@chromium.org
BUG=chromium:109362
LOG=Y

Review URL: https://codereview.chromium.org/701093003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@25289 ce2b1a6d-e550-0410-aec6-3dcde31c8c00