Make --always-opt also optimize toplevel code.

R=jacob.bramley@arm.com, titzer@chromium.org, rossberg@chromium.org

Review URL: https://codereview.chromium.org/410153002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22666 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reduce max executable size limit.

BUG=395679
LOG=n
R=jarin@chromium.org

Review URL: https://codereview.chromium.org/413313003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22667 ce2b1a6d-e550-0410-aec6-3dcde31c8c00