Make `s_is_adapter_wanted` and the elements of `s_config_rumble_enabled`
atomic.
The CPU thread reads `s_is_adapter_wanted` and `s_config_rumble_enabled`
in `Output`, while the host thread writes to them in `RefreshConfig`.
The simplest way to trigger this race is to close the `Settings` window
while playing a game with the adapter active.
ac78e52cf9