[a64]: Disable failing sparse-array-reverse on a64 debug builds.

BUG=v8:3158
LOG=N
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/160633002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19340 ce2b1a6d-e550-0410-aec6-3dcde31c8c00