Reuse the .gcda statistics from the make check run
Reuse the .gcda statistics from the make check run

Rerun all test cases causes a time out error in travis ci. Now we can
only run make coversall after running make check.

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