Update to 0.8.1:

Dave Airlie (1):
      modesetting: change output names for secondary GPUs

Keith Packard (2):
      Clean up compiler warnings.
      Handle new DamageUnregister API which has only one argument

Maarten Lankhorst (1):
      bump to 0.8.1

Thierry Reding (2):
      Staticise and constify output names
      Properly identify DSI outputs