Log Message:
Update to 0.12.9:

Major changes in 0.12.9
=======================
* rename newly introduced SpiceImageCompress enum to SpiceImageCompression
  as otherwise it was clashing with the definition used by older spice-server
  releases, breaking QEMU build

Major changes in 0.12.8
=======================
* add LZ4 support
* add audio volume synchronization
* deprecate unused vdi-dev
* add 'preferred-compression' message/capability
* add a new Windows driver escape code to send
  monitors capability from guest to client