qemu need the id to start with a letter for some reason.
If this is not the case qemu will fail:
```
qemu-system-x86_64: -device virtserialport,chardev=ad053e0bb519f_ready,name=org.fedoraproject.port.0: Property 'virtserialport.chardev' can't find value 'ad053e0bb519f_ready'
er
Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.
```
To fix this we just add an "a" in front of it.
Signed-off-by: Paul Holzinger <pholzing@redhat.com>
a26cf638e0