This update for vhostmd fixes the following issues:

Update to vhostmd 1.1 (bsc#1129772)

- Merge libserialclient with libmetrics
- Add virtio as transport mechanism
- Update to work with modern Xen
- Add SIGPIPE handler and reconnect
- Add systemd service file
- Modernize build files
- Misc bug fixes and improvements

This update was imported from the SUSE:SLE-15:Update update project.