[ASDeallocQueue] Fix teardown of thread (doesn't currently happen due to singleton). (#2410)
[ASDeallocQueue] Fix teardown of thread (doesn't currently happen due to singleton). (#2410)

Although this didn't occur _currently_, the code was incorrect and needs to be fixed.
facebook/AsyncDisplayKit,lappp9/AsyncDisplayKit,romyilano/AsyncDisplayKit,gazreese/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,lappp9/AsyncDisplayKit,george-gw/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,facebook/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,rmls/AsyncDisplayKit,bimawa/AsyncDisplayKit,harryworld/AsyncDisplayKit,JetZou/AsyncDisplayKit,flovouin/AsyncDisplayKit,bimawa/AsyncDisplayKit,JetZou/AsyncDisplayKit,JetZou/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,facebook/AsyncDisplayKit,george-gw/AsyncDisplayKit,maicki/AsyncDisplayKit,JetZou/AsyncDisplayKit,george-gw/AsyncDisplayKit,samhsiung/AsyncDisplayKit,rmls/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,JetZou/AsyncDisplayKit,samhsiung/AsyncDisplayKit,rmls/AsyncDisplayKit,harryworld/AsyncDisplayKit,maicki/AsyncDisplayKit,flovouin/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,bimawa/AsyncDisplayKit,lappp9/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,maicki/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,bimawa/AsyncDisplayKit,facebook/AsyncDisplayKit,harryworld/AsyncDisplayKit,flovouin/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,romyilano/AsyncDisplayKit,romyilano/AsyncDisplayKit,gazreese/AsyncDisplayKit,harryworld/AsyncDisplayKit,gazreese/AsyncDisplayKit,rahul-malik/AsyncDisplayKit,romyilano/AsyncDisplayKit,rmls/AsyncDisplayKit,maicki/AsyncDisplayKit,gazreese/AsyncDisplayKit,george-gw/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,samhsiung/AsyncDisplayKit,maicki/AsyncDisplayKit,samhsiung/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,flovouin/AsyncDisplayKit,flovouin/AsyncDisplayKit,rmls/AsyncDisplayKit,aaronschubert0/AsyncDisplayKit,lappp9/AsyncDisplayKit,tomizimobile/AsyncDisplayKit,chrisdanford/AsyncDisplayKit,harryworld/AsyncDisplayKit