Create done marker directory (#19538)
Create done marker directory (#19538)

Otherwise the done marker isn't created in init-tools.sh, causing the
tools to be restored on each build.
dhoehna/corefx,cydhaselton/corefx,wtgodbe/corefx,ravimeda/corefx,dhoehna/corefx,the-dwyer/corefx,MaggieTsang/corefx,zhenlan/corefx,krk/corefx,parjong/corefx,krk/corefx,ericstj/corefx,jlin177/corefx,JosephTremoulet/corefx,stone-li/corefx,MaggieTsang/corefx,tijoytom/corefx,Jiayili1/corefx,krytarowski/corefx,nbarbettini/corefx,dotnet-bot/corefx,twsouthwick/corefx,elijah6/corefx,shimingsg/corefx,BrennanConroy/corefx,Ermiar/corefx,twsouthwick/corefx,ptoonen/corefx,ViktorHofer/corefx,MaggieTsang/corefx,nchikanov/corefx,mmitche/corefx,yizhang82/corefx,jlin177/corefx,wtgodbe/corefx,shimingsg/corefx,alexperovich/corefx,Jiayili1/corefx,rubo/corefx,DnlHarvey/corefx,Jiayili1/corefx,YoupHulsebos/corefx,nbarbettini/corefx,elijah6/corefx,ravimeda/corefx,dhoehna/corefx,axelheer/corefx,seanshpark/corefx,zhenlan/corefx,gkhanna79/corefx,MaggieTsang/corefx,billwert/corefx,JosephTremoulet/corefx,parjong/corefx,shimingsg/corefx,stone-li/corefx,JosephTremoulet/corefx,jlin177/corefx,jlin177/corefx,dhoehna/corefx,rjxby/corefx,MaggieTsang/corefx,JosephTremoulet/corefx,dhoehna/corefx,stone-li/corefx,parjong/corefx,rjxby/corefx,wtgodbe/corefx,dotnet-bot/corefx,yizhang82/corefx,stephenmichaelf/corefx,JosephTremoulet/corefx,zhenlan/corefx,ravimeda/corefx,Ermiar/corefx,billwert/corefx,YoupHulsebos/corefx,DnlHarvey/corefx,parjong/corefx,DnlHarvey/corefx,stephenmichaelf/corefx,ViktorHofer/corefx,zhenlan/corefx,cydhaselton/corefx,MaggieTsang/corefx,ravimeda/corefx,nchikanov/corefx,ericstj/corefx,the-dwyer/corefx,ViktorHofer/corefx,rubo/corefx,DnlHarvey/corefx,nchikanov/corefx,ptoonen/corefx,rubo/corefx,stone-li/corefx,shimingsg/corefx,elijah6/corefx,Ermiar/corefx,fgreinacher/corefx,zhenlan/corefx,yizhang82/corefx,fgreinacher/corefx,axelheer/corefx,elijah6/corefx,YoupHulsebos/corefx,Jiayili1/corefx,nbarbettini/corefx,parjong/corefx,tijoytom/corefx,nchikanov/corefx,stone-li/corefx,twsouthwick/corefx,richlander/corefx,axelheer/corefx,Ermiar/corefx,ericstj/corefx,rubo/corefx,dotnet-bot/corefx,krytarowski/corefx,rjxby/corefx,alexperovich/corefx,cydhaselton/corefx,krk/corefx,nbarbettini/corefx,richlander/corefx,axelheer/corefx,YoupHulsebos/corefx,rubo/corefx,ravimeda/corefx,elijah6/corefx,ericstj/corefx,JosephTremoulet/corefx,wtgodbe/corefx,Jiayili1/corefx,zhenlan/corefx,gkhanna79/corefx,ravimeda/corefx,stone-li/corefx,mazong1123/corefx,stephenmichaelf/corefx,richlander/corefx,wtgodbe/corefx,alexperovich/corefx,shimingsg/corefx,twsouthwick/corefx,seanshpark/corefx,richlander/corefx,dhoehna/corefx,dotnet-bot/corefx,krk/corefx,gkhanna79/corefx,mmitche/corefx,dotnet-bot/corefx,cydhaselton/corefx,seanshpark/corefx,krk/corefx,Jiayili1/corefx,nbarbettini/corefx,mmitche/corefx,richlander/corefx,nchikanov/corefx,seanshpark/corefx,Ermiar/corefx,yizhang82/corefx,Ermiar/corefx,billwert/corefx,the-dwyer/corefx,DnlHarvey/corefx,ericstj/corefx,tijoytom/corefx,mazong1123/corefx,YoupHulsebos/corefx,cydhaselton/corefx,yizhang82/corefx,mazong1123/corefx,alexperovich/corefx,twsouthwick/corefx,ptoonen/corefx,fgreinacher/corefx,the-dwyer/corefx,mazong1123/corefx,rjxby/corefx,stone-li/corefx,nchikanov/corefx,mazong1123/corefx,parjong/corefx,axelheer/corefx,mmitche/corefx,tijoytom/corefx,fgreinacher/corefx,ViktorHofer/corefx,stephenmichaelf/corefx,seanshpark/corefx,rjxby/corefx,stephenmichaelf/corefx,cydhaselton/corefx,wtgodbe/corefx,dhoehna/corefx,mmitche/corefx,elijah6/corefx,BrennanConroy/corefx,gkhanna79/corefx,ptoonen/corefx,nbarbettini/corefx,yizhang82/corefx,ViktorHofer/corefx,tijoytom/corefx,YoupHulsebos/corefx,krytarowski/corefx,DnlHarvey/corefx,the-dwyer/corefx,shimingsg/corefx,billwert/corefx,DnlHarvey/corefx,mazong1123/corefx,zhenlan/corefx,krk/corefx,Jiayili1/corefx,alexperovich/corefx,ravimeda/corefx,jlin177/corefx,BrennanConroy/corefx,rjxby/corefx,cydhaselton/corefx,gkhanna79/corefx,jlin177/corefx,alexperovich/corefx,ptoonen/corefx,krytarowski/corefx,krytarowski/corefx,the-dwyer/corefx,mmitche/corefx,nchikanov/corefx,stephenmichaelf/corefx,dotnet-bot/corefx,yizhang82/corefx,ptoonen/corefx,nbarbettini/corefx,the-dwyer/corefx,ViktorHofer/corefx,YoupHulsebos/corefx,ericstj/corefx,krytarowski/corefx,twsouthwick/corefx,elijah6/corefx,dotnet-bot/corefx,axelheer/corefx,Ermiar/corefx,ptoonen/corefx,MaggieTsang/corefx,mazong1123/corefx,shimingsg/corefx,mmitche/corefx,gkhanna79/corefx,stephenmichaelf/corefx,wtgodbe/corefx,tijoytom/corefx,seanshpark/corefx,gkhanna79/corefx,billwert/corefx,tijoytom/corefx,billwert/corefx,parjong/corefx,ericstj/corefx,ViktorHofer/corefx,rjxby/corefx,jlin177/corefx,krytarowski/corefx,alexperovich/corefx,JosephTremoulet/corefx,seanshpark/corefx,twsouthwick/corefx,richlander/corefx,krk/corefx,richlander/corefx,billwert/corefx