Fixed libgtest linking error.
Fixed libgtest linking error.

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