Fix building android gn

BUG=none
TBR=machenbach@chromium.org
LOG=n

Review URL: https://codereview.chromium.org/313923002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21678 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Revert "Folding of bounded dynamic size allocations with const size allocations."

This reverts r21675.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/311173002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21679 ce2b1a6d-e550-0410-aec6-3dcde31c8c00