Add gflags to the installing packages.
Add gflags to the installing packages.

cmu-db/peloton,prashasthip/peloton,ShuxinLin/peloton,prashasthip/peloton,AngLi-Leon/peloton,AngLi-Leon/peloton,vittvolt/peloton,yingjunwu/peloton,AllisonWang/peloton,vittvolt/15721-peloton,malin1993ml/peloton,ShuxinLin/peloton,wangziqi2016/peloton,apavlo/peloton,cmu-db/peloton,eric-haibin-lin/peloton-1,wangziqi2016/peloton,cmu-db/peloton,prashasthip/peloton,malin1993ml/peloton,haojin2/peloton,vittvolt/peloton,yingjunwu/peloton,wangziqi2016/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,eric-haibin-lin/peloton-1,PauloAmora/peloton,prashasthip/peloton,wangziqi2016/peloton,AllisonWang/peloton,phisiart/peloton-p3,vittvolt/peloton,ShuxinLin/peloton,seojungmin/peloton,vittvolt/15721-peloton,cmu-db/peloton,prashasthip/peloton,AllisonWang/peloton,vittvolt/peloton,PauloAmora/peloton,ShuxinLin/peloton,jessesleeping/iso_peloton,yingjunwu/peloton,malin1993ml/peloton,PauloAmora/peloton,jessesleeping/iso_peloton,AllisonWang/peloton,eric-haibin-lin/peloton-1,jessesleeping/iso_peloton,phisiart/peloton-p3,wangziqi2016/peloton,yingjunwu/peloton,vittvolt/peloton,eric-haibin-lin/peloton-1,AllisonWang/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,vittvolt/15721-peloton,wangziqi2016/peloton,seojungmin/peloton,AllisonWang/peloton,apavlo/peloton,eric-haibin-lin/peloton-1,cmu-db/peloton,AngLi-Leon/peloton,jessesleeping/iso_peloton,phisiart/peloton-p3,haojin2/peloton,vittvolt/15721-peloton,AngLi-Leon/peloton,vittvolt/15721-peloton,malin1993ml/peloton,haojin2/peloton,PauloAmora/peloton,seojungmin/peloton,yingjunwu/peloton,cmu-db/peloton,seojungmin/peloton,ShuxinLin/peloton,apavlo/peloton,apavlo/peloton,haojin2/peloton,PauloAmora/peloton,phisiart/peloton-p3,vittvolt/15721-peloton,prashasthip/peloton,malin1993ml/peloton,PauloAmora/peloton,eric-haibin-lin/peloton-1,seojungmin/peloton,haojin2/peloton,apavlo/peloton,vittvolt/peloton,apavlo/peloton,malin1993ml/peloton,AngLi-Leon/peloton,ShuxinLin/peloton,yingjunwu/peloton,seojungmin/peloton,haojin2/peloton,jessesleeping/iso_peloton,AngLi-Leon/peloton