goprotobuf: Add Jeff Hodges to CONTRIBUTORS (individual CLA).
goprotobuf: Add Jeff Hodges to CONTRIBUTORS (individual CLA).

R=nigeltao, bradfitz
CC=golang-dev, jeff
http://codereview.appspot.com/6851106

kung-foo/protobuf,mwitkow-io/protobuf,eduardiazf/protobuf,tamird/protobuf-2,csuideal/protobuf,jeremyletang/protobuf,skyportsystems/go-protobuf,velocity-toolkit/protobuf-1,trdata/protobuf,francoishill/protobuf,golang/protobuf,adnaan/protobuf,alskjstl/protobuf,aoeu/protobuf,skyportsystems/go-protobuf,tamird/protobuf-2,ArtemTeleshev/go-protobuf,hailocab/protobuf,golang/protobuf,fuchsia-mirror/third_party-github.com-golang-protobuf,trdata/protobuf,linkedin-inc/protobuf,jmptrader/protobuf-1,ekle/protoc-gen-goweb_test,qinlodestar/protobuf,daemonl/protobuf,ekle/protoc-gen-goweb,jrbarron/protobuf,fuchsia-mirror/third_party-github.com-golang-protobuf