Generate.sh should generate go file together

I have some proto files , and A import B in same package.
It will break in go import 
I change the generate.sh 
```
find ${PROTOS_PATH} -type f -name "*.proto" -exec protoc -I${PROTOS_PATH} \
```
to
```
find ${PROTOS_PATH} -type f -name "*.proto"|xargs protoc -I${PROTOS_PATH} \
```

https://github.com/golang/protobuf/issues/10

