Disable stress-gc for memento-related test.

R=mvstanton@chromium.org

Review URL: https://chromiumcodereview.appspot.com/64003004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17559 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Handlify Runtime::SetObjectProperty

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/62333002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17560 ce2b1a6d-e550-0410-aec6-3dcde31c8c00