Update BuildToolsVersion.txt
Update BuildToolsVersion.txt

Pick up build tools with built-in functional test runner script for Helix
jhendrixMSFT/corefx,yizhang82/corefx,axelheer/corefx,dhoehna/corefx,Priya91/corefx-1,jcme/corefx,jlin177/corefx,ericstj/corefx,tijoytom/corefx,nchikanov/corefx,lggomez/corefx,axelheer/corefx,shmao/corefx,richlander/corefx,Priya91/corefx-1,ptoonen/corefx,cartermp/corefx,SGuyGe/corefx,nbarbettini/corefx,BrennanConroy/corefx,jcme/corefx,rjxby/corefx,elijah6/corefx,khdang/corefx,mazong1123/corefx,iamjasonp/corefx,alexperovich/corefx,Chrisboh/corefx,cydhaselton/corefx,rubo/corefx,parjong/corefx,shmao/corefx,khdang/corefx,jcme/corefx,iamjasonp/corefx,jhendrixMSFT/corefx,Ermiar/corefx,stone-li/corefx,rjxby/corefx,JosephTremoulet/corefx,zhenlan/corefx,twsouthwick/corefx,DnlHarvey/corefx,parjong/corefx,Jiayili1/corefx,lggomez/corefx,elijah6/corefx,axelheer/corefx,wtgodbe/corefx,YoupHulsebos/corefx,jlin177/corefx,iamjasonp/corefx,tijoytom/corefx,dotnet-bot/corefx,shmao/corefx,the-dwyer/corefx,shimingsg/corefx,nchikanov/corefx,wtgodbe/corefx,MaggieTsang/corefx,Chrisboh/corefx,seanshpark/corefx,seanshpark/corefx,wtgodbe/corefx,richlander/corefx,wtgodbe/corefx,yizhang82/corefx,stone-li/corefx,MaggieTsang/corefx,parjong/corefx,fgreinacher/corefx,elijah6/corefx,billwert/corefx,parjong/corefx,marksmeltzer/corefx,BrennanConroy/corefx,axelheer/corefx,seanshpark/corefx,zhenlan/corefx,mmitche/corefx,stone-li/corefx,mmitche/corefx,zhenlan/corefx,stone-li/corefx,rahku/corefx,rjxby/corefx,shmao/corefx,kkurni/corefx,shahid-pk/corefx,shimingsg/corefx,shimingsg/corefx,rahku/corefx,tstringer/corefx,iamjasonp/corefx,cydhaselton/corefx,krytarowski/corefx,ptoonen/corefx,kkurni/corefx,Chrisboh/corefx,iamjasonp/corefx,rubo/corefx,yizhang82/corefx,YoupHulsebos/corefx,khdang/corefx,krk/corefx,weltkante/corefx,adamralph/corefx,stephenmichaelf/corefx,mazong1123/corefx,shimingsg/corefx,billwert/corefx,wtgodbe/corefx,MaggieTsang/corefx,alphonsekurian/corefx,krk/corefx,alphonsekurian/corefx,jlin177/corefx,adamralph/corefx,the-dwyer/corefx,ellismg/corefx,Ermiar/corefx,dotnet-bot/corefx,jlin177/corefx,mmitche/corefx,marksmeltzer/corefx,JosephTremoulet/corefx,alphonsekurian/corefx,yizhang82/corefx,rahku/corefx,the-dwyer/corefx,marksmeltzer/corefx,SGuyGe/corefx,mazong1123/corefx,ravimeda/corefx,zhenlan/corefx,MaggieTsang/corefx,JosephTremoulet/corefx,DnlHarvey/corefx,dhoehna/corefx,ericstj/corefx,manu-silicon/corefx,pallavit/corefx,stephenmichaelf/corefx,shahid-pk/corefx,krk/corefx,marksmeltzer/corefx,jhendrixMSFT/corefx,Jiayili1/corefx,rubo/corefx,alphonsekurian/corefx,gkhanna79/corefx,Petermarcu/corefx,mazong1123/corefx,YoupHulsebos/corefx,jlin177/corefx,jcme/corefx,stone-li/corefx,weltkante/corefx,krytarowski/corefx,ViktorHofer/corefx,mazong1123/corefx,yizhang82/corefx,krk/corefx,tijoytom/corefx,ericstj/corefx,dotnet-bot/corefx,lggomez/corefx,dsplaisted/corefx,twsouthwick/corefx,alphonsekurian/corefx,wtgodbe/corefx,manu-silicon/corefx,ravimeda/corefx,stephenmichaelf/corefx,ericstj/corefx,iamjasonp/corefx,seanshpark/corefx,the-dwyer/corefx,zhenlan/corefx,krk/corefx,YoupHulsebos/corefx,yizhang82/corefx,stephenmichaelf/corefx,ViktorHofer/corefx,Priya91/corefx-1,ravimeda/corefx,ViktorHofer/corefx,nbarbettini/corefx,tijoytom/corefx,Ermiar/corefx,pallavit/corefx,elijah6/corefx,pallavit/corefx,dhoehna/corefx,the-dwyer/corefx,krk/corefx,zhenlan/corefx,Priya91/corefx-1,gkhanna79/corefx,pallavit/corefx,rubo/corefx,JosephTremoulet/corefx,ViktorHofer/corefx,Petermarcu/corefx,alphonsekurian/corefx,twsouthwick/corefx,manu-silicon/corefx,richlander/corefx,Petermarcu/corefx,dotnet-bot/corefx,YoupHulsebos/corefx,tstringer/corefx,weltkante/corefx,weltkante/corefx,fgreinacher/corefx,billwert/corefx,weltkante/corefx,MaggieTsang/corefx,ptoonen/corefx,Petermarcu/corefx,ellismg/corefx,JosephTremoulet/corefx,jhendrixMSFT/corefx,billwert/corefx,ellismg/corefx,weltkante/corefx,jhendrixMSFT/corefx,nchikanov/corefx,SGuyGe/corefx,krk/corefx,JosephTremoulet/corefx,jlin177/corefx,stephenmichaelf/corefx,DnlHarvey/corefx,gkhanna79/corefx,jhendrixMSFT/corefx,ericstj/corefx,rjxby/corefx,seanshpark/corefx,Petermarcu/corefx,cydhaselton/corefx,nchikanov/corefx,MaggieTsang/corefx,gkhanna79/corefx,rahku/corefx,cartermp/corefx,parjong/corefx,dsplaisted/corefx,khdang/corefx,cydhaselton/corefx,nbarbettini/corefx,shimingsg/corefx,alexperovich/corefx,nchikanov/corefx,tstringer/corefx,stephenmichaelf/corefx,marksmeltzer/corefx,nchikanov/corefx,Jiayili1/corefx,twsouthwick/corefx,cartermp/corefx,cydhaselton/corefx,Chrisboh/corefx,khdang/corefx,shimingsg/corefx,ravimeda/corefx,dhoehna/corefx,cartermp/corefx,Jiayili1/corefx,ravimeda/corefx,YoupHulsebos/corefx,tijoytom/corefx,manu-silicon/corefx,wtgodbe/corefx,dhoehna/corefx,Ermiar/corefx,SGuyGe/corefx,shahid-pk/corefx,elijah6/corefx,twsouthwick/corefx,cydhaselton/corefx,richlander/corefx,nbarbettini/corefx,rahku/corefx,cydhaselton/corefx,yizhang82/corefx,fgreinacher/corefx,alphonsekurian/corefx,billwert/corefx,YoupHulsebos/corefx,mmitche/corefx,axelheer/corefx,stone-li/corefx,ViktorHofer/corefx,khdang/corefx,ellismg/corefx,stephenmichaelf/corefx,ptoonen/corefx,alexperovich/corefx,zhenlan/corefx,rjxby/corefx,ptoonen/corefx,ptoonen/corefx,jhendrixMSFT/corefx,kkurni/corefx,krytarowski/corefx,JosephTremoulet/corefx,mazong1123/corefx,marksmeltzer/corefx,shahid-pk/corefx,lggomez/corefx,tstringer/corefx,Jiayili1/corefx,billwert/corefx,Priya91/corefx-1,manu-silicon/corefx,rahku/corefx,tstringer/corefx,DnlHarvey/corefx,weltkante/corefx,mmitche/corefx,richlander/corefx,ravimeda/corefx,richlander/corefx,gkhanna79/corefx,krytarowski/corefx,Jiayili1/corefx,lggomez/corefx,shahid-pk/corefx,BrennanConroy/corefx,dsplaisted/corefx,nbarbettini/corefx,adamralph/corefx,manu-silicon/corefx,kkurni/corefx,kkurni/corefx,shmao/corefx,SGuyGe/corefx,tijoytom/corefx,richlander/corefx,MaggieTsang/corefx,dotnet-bot/corefx,DnlHarvey/corefx,nchikanov/corefx,ptoonen/corefx,krytarowski/corefx,DnlHarvey/corefx,cartermp/corefx,gkhanna79/corefx,shmao/corefx,dotnet-bot/corefx,krytarowski/corefx,ellismg/corefx,gkhanna79/corefx,shimingsg/corefx,rjxby/corefx,fgreinacher/corefx,ellismg/corefx,Priya91/corefx-1,parjong/corefx,the-dwyer/corefx,tstringer/corefx,elijah6/corefx,jlin177/corefx,lggomez/corefx,jcme/corefx,alexperovich/corefx,pallavit/corefx,lggomez/corefx,nbarbettini/corefx,Jiayili1/corefx,alexperovich/corefx,Chrisboh/corefx,krytarowski/corefx,elijah6/corefx,stone-li/corefx,manu-silicon/corefx,ViktorHofer/corefx,SGuyGe/corefx,marksmeltzer/corefx,Petermarcu/corefx,mmitche/corefx,ravimeda/corefx,Ermiar/corefx,mmitche/corefx,alexperovich/corefx,dhoehna/corefx,dotnet-bot/corefx,Chrisboh/corefx,shahid-pk/corefx,rahku/corefx,mazong1123/corefx,twsouthwick/corefx,kkurni/corefx,billwert/corefx,cartermp/corefx,dhoehna/corefx,seanshpark/corefx,the-dwyer/corefx,alexperovich/corefx,jcme/corefx,iamjasonp/corefx,parjong/corefx,nbarbettini/corefx,rjxby/corefx,Ermiar/corefx,DnlHarvey/corefx,ViktorHofer/corefx,ericstj/corefx,Ermiar/corefx,shmao/corefx,axelheer/corefx,rubo/corefx,pallavit/corefx,twsouthwick/corefx,Petermarcu/corefx,tijoytom/corefx,ericstj/corefx,seanshpark/corefx