Add hashimoto@ to CONTRIBUTORS
Add hashimoto@ to CONTRIBUTORS

google/kati,danw/kati,google/kati,colincross/kati,danw/kati,shinh/kati,danw/kati,google/kati,shinh/kati,danw/kati,google/kati,colincross/kati,shinh/kati,shinh/kati,colincross/kati,danw/kati,shinh/kati,colincross/kati,google/kati,shinh/kati,danw/kati,colincross/kati,colincross/kati