Add support for Token::NE and Token::NE_STRICT to TokenToCondition.

This is required to be able to use these tokens with
HCompareNumericAndBranch.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/27043010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@17239 ce2b1a6d-e550-0410-aec6-3dcde31c8c00