Fix Android build issue 247303

ARM v7 support isn't available in the android build snapshot.

BUG=247303
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/16364007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14969 ce2b1a6d-e550-0410-aec6-3dcde31c8c00