The max executable size must be less than or equal to the max old
space size. It is an extra limit in addition to the old space size.

Review URL: http://codereview.chromium.org/4730002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5802 ce2b1a6d-e550-0410-aec6-3dcde31c8c00