don't use parallel build as default
don't use parallel build as default

lizhangqu/asmack,tks-dp/asmack,tks-dp/asmack,ZachGoldberg/asmack,lovecc0923/asmack,Flowdalic/asmack,chuangWu/asmack,lovecc0923/asmack,lizhangqu/asmack,Flowdalic/asmack,ZachGoldberg/asmack,chuangWu/asmack