[FAQ] how to build and play vhost-user-blk with qemu code

[Gao, Wayne]

Hello dear experts.

I would like to try vhost-user-blk, may I know what is the guide for this?
For now I do not know how to build and run it, and how to start one vhost 
target emulator?

https://github.com/qemu/qemu/tree/master/contrib/vhost-user-blk