vhost: Release v0.8.0

Release a new version with Xen support.
We broke the build with the default features, but not yet made the
release, so this should be the real release.

Fixes: b128901 ("vhost: Release v0.8.0")
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>

crates/vhost/CHANGELOG.md

@@ -16,6 +16,7 @@
 
 ### Fixed
 - [[#165]](https://github.com/rust-vmm/vhost/pull/165) vhost: vdpa: Provide custom set_vring_addr() implementation
+- [[#172]](https://github.com/rust-vmm/vhost/pull/172) Vhost user fix
 
 ## [0.7.0]