VM debugger states

typedef enum _PRL_VM_DEBUGGER_STATE {
  PVMD_SERVER_DISABLED = 0,
  PVMD_SERVER_ENABLED = 1,
  PVMD_CLIENT_DETACHED = PVMD_SERVER_ENABLED,
  PVMD_GUEST_RUNNING = 2,
  PVMD_GUEST_STOPPED = 3
} PRL_VM_DEBUGGER_STATE;