Skip string-oom tests on nacl.
Skip string-oom tests on nacl.

R=machenbach@chromium.org
TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/207633004

git-svn-id: b158db1e4b4ab85d4c9e510fdef4b1e8c614b15b@20152 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh