Added packed attribute for frozen structs
Added packed attribute for frozen structs

Test Plan: fbconfig common/datastruct/counter/time_window/test:distinct_counter_naive_test && fbmake runtests

Reviewed By: davejwatson@fb.com

FB internal diff: D1185791


sinjar666/fbthrift,soumith/fbthrift,kangkot/fbthrift,HankFaan/fbthrift,SergeyMakarenko/fbthrift,facebook/fbthrift,facebook/fbthrift,getyourguide/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,SergeyMakarenko/fbthrift,guker/fbthrift,uber/fbthrift,fengshao0907/fbthrift,HankFaan/fbthrift,jesboat/fbthrift,sinjar666/fbthrift,LinusU/fbthrift,sinjar666/fbthrift,chjp2046/fbthrift,kangkot/fbthrift,jesboat/fbthrift,guker/fbthrift,uber/fbthrift,chjp2046/fbthrift,raphaelamorim/fbthrift,uber/fbthrift,HankFaan/fbthrift,kangkot/fbthrift,project-zerus/fbthrift,Orvid/fbthrift,soumith/fbthrift,raphaelamorim/fbthrift,facebook/fbthrift,project-zerus/fbthrift,SergeyMakarenko/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,maxwell-demon/fbthrift,LinusU/fbthrift,Orvid/fbthrift,jesboat/fbthrift,HankFaan/fbthrift,HankFaan/fbthrift,HankFaan/fbthrift,project-zerus/fbthrift,fengshao0907/fbthrift,fengshao0907/fbthrift,fengshao0907/fbthrift,chjp2046/fbthrift,HankFaan/fbthrift,maxwell-demon/fbthrift,getyourguide/fbthrift,guker/fbthrift,jesboat/fbthrift,LinusU/fbthrift,HankFaan/fbthrift,SergeyMakarenko/fbthrift,project-zerus/fbthrift,chjp2046/fbthrift,kangkot/fbthrift,LinusU/fbthrift,guker/fbthrift,project-zerus/fbthrift,uber/fbthrift,SergeyMakarenko/fbthrift,uber/fbthrift,chjp2046/fbthrift,fengshao0907/fbthrift,soumith/fbthrift,SergeyMakarenko/fbthrift,project-zerus/fbthrift,sinjar666/fbthrift,kangkot/fbthrift,raphaelamorim/fbthrift,raphaelamorim/fbthrift,getyourguide/fbthrift,kangkot/fbthrift,chjp2046/fbthrift,jesboat/fbthrift,HankFaan/fbthrift,kangkot/fbthrift,jesboat/fbthrift,maxwell-demon/fbthrift,chjp2046/fbthrift,guker/fbthrift,maxwell-demon/fbthrift,SergeyMakarenko/fbthrift,jesboat/fbthrift,maxwell-demon/fbthrift,raphaelamorim/fbthrift,LinusU/fbthrift,soumith/fbthrift,kangkot/fbthrift,project-zerus/fbthrift,Orvid/fbthrift,guker/fbthrift,project-zerus/fbthrift,LinusU/fbthrift,soumith/fbthrift,jesboat/fbthrift,chjp2046/fbthrift,uber/fbthrift,LinusU/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,Orvid/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,facebook/fbthrift,uber/fbthrift,getyourguide/fbthrift,sinjar666/fbthrift,Orvid/fbthrift,sinjar666/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,project-zerus/fbthrift,chjp2046/fbthrift,getyourguide/fbthrift,facebook/fbthrift,project-zerus/fbthrift,uber/fbthrift,uber/fbthrift,maxwell-demon/fbthrift,Orvid/fbthrift,getyourguide/fbthrift,Orvid/fbthrift,uber/fbthrift,kangkot/fbthrift,chjp2046/fbthrift,LinusU/fbthrift,getyourguide/fbthrift,maxwell-demon/fbthrift,facebook/fbthrift,fengshao0907/fbthrift,LinusU/fbthrift,soumith/fbthrift,SergeyMakarenko/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,fengshao0907/fbthrift,jesboat/fbthrift,uber/fbthrift,sinjar666/fbthrift,project-zerus/fbthrift,getyourguide/fbthrift,getyourguide/fbthrift,raphaelamorim/fbthrift,LinusU/fbthrift,maxwell-demon/fbthrift,jesboat/fbthrift,sinjar666/fbthrift,fengshao0907/fbthrift,SergeyMakarenko/fbthrift,SergeyMakarenko/fbthrift,soumith/fbthrift,kangkot/fbthrift,fengshao0907/fbthrift,getyourguide/fbthrift,sinjar666/fbthrift,soumith/fbthrift,jesboat/fbthrift,soumith/fbthrift,fengshao0907/fbthrift,Orvid/fbthrift,soumith/fbthrift,raphaelamorim/fbthrift,chjp2046/fbthrift,HankFaan/fbthrift,LinusU/fbthrift,guker/fbthrift,jesboat/fbthrift,raphaelamorim/fbthrift,Orvid/fbthrift,chjp2046/fbthrift,maxwell-demon/fbthrift,project-zerus/fbthrift,raphaelamorim/fbthrift,soumith/fbthrift,HankFaan/fbthrift,facebook/fbthrift,uber/fbthrift,guker/fbthrift,getyourguide/fbthrift,kangkot/fbthrift,guker/fbthrift,SergeyMakarenko/fbthrift,raphaelamorim/fbthrift,guker/fbthrift,guker/fbthrift