AtomicWaker: store, not swap if old value is not used

[stepancheg]

No description provided.

[stepancheg]

cc @Pslydhh

[Pslydhh]

Thanks!
I'm completely agress with you here semantically speaking swap is more suitable than store.
but maybe the question is about memory's synchronize, a long conversation about this show that swap is suitable choice in mutiple threads and architectures(not only x86), store is not.
use store
store can't acquire
use swap instead store

[stepancheg]

@Pslydhh thank you for the links!