Cause build.cmd to set errorlevel to 1 on failed prereqs
Cause build.cmd to set errorlevel to 1 on failed prereqs

parjong/corefx,stormleoxia/corefx,rjxby/corefx,s0ne0me/corefx,rubo/corefx,lydonchandra/corefx,FiveTimesTheFun/corefx,thiagodin/corefx,kkurni/corefx,jeremymeng/corefx,larsbj1988/corefx,fgreinacher/corefx,shmao/corefx,nbarbettini/corefx,adamralph/corefx,rjxby/corefx,cartermp/corefx,CloudLens/corefx,lggomez/corefx,ericstj/corefx,alphonsekurian/corefx,dotnet-bot/corefx,Ermiar/corefx,contoso-dnf-a/corefx,andyhebear/corefx,parjong/corefx,mmitche/corefx,elijah6/corefx,CloudLens/corefx,scott156/corefx,zhangwenquan/corefx,xuweixuwei/corefx,jcme/corefx,tijoytom/corefx,uhaciogullari/corefx,bpschoch/corefx,Frank125/corefx,tstringer/corefx,viniciustaveira/corefx,lggomez/corefx,adamralph/corefx,manu-silicon/corefx,alexperovich/corefx,krk/corefx,ViktorHofer/corefx,vidhya-bv/corefx-sorting,iamjasonp/corefx,marksmeltzer/corefx,yizhang82/corefx,MaggieTsang/corefx,seanshpark/corefx,vijaykota/corefx,stone-li/corefx,comdiv/corefx,cydhaselton/corefx,benjamin-bader/corefx,Ermiar/corefx,wtgodbe/corefx,mellinoe/corefx,Jiayili1/corefx,spoiledsport/corefx,ptoonen/corefx,tijoytom/corefx,rahku/corefx,cydhaselton/corefx,DnlHarvey/corefx,oceanho/corefx,marksmeltzer/corefx,fernando-rodriguez/corefx,erpframework/corefx,matthubin/corefx,chenkennt/corefx,heXelium/corefx,seanshpark/corefx,zhenlan/corefx,Jiayili1/corefx,Frank125/corefx,dotnet-bot/corefx,shmao/corefx,CloudLens/corefx,shrutigarg/corefx,dtrebbien/corefx,ravimeda/corefx,josguil/corefx,MaggieTsang/corefx,yizhang82/corefx,YoupHulsebos/corefx,chaitrakeshav/corefx,jhendrixMSFT/corefx,nchikanov/corefx,Priya91/corefx-1,ericstj/corefx,manu-silicon/corefx,dtrebbien/corefx,DnlHarvey/corefx,kyulee1/corefx,lydonchandra/corefx,DnlHarvey/corefx,dhoehna/corefx,gregg-miskelly/corefx,dotnet-bot/corefx,marksmeltzer/corefx,cartermp/corefx,destinyclown/corefx,shana/corefx,popolan1986/corefx,seanshpark/corefx,stephenmichaelf/corefx,Frank125/corefx,jeremymeng/corefx,mafiya69/corefx,jmhardison/corefx,alphonsekurian/corefx,stephenmichaelf/corefx,chenkennt/corefx,anjumrizwi/corefx,cnbin/corefx,jhendrixMSFT/corefx,mellinoe/corefx,CherryCxldn/corefx,mmitche/corefx,Chrisboh/corefx,iamjasonp/corefx,the-dwyer/corefx,zmaruo/corefx,SGuyGe/corefx,ravimeda/corefx,krytarowski/corefx,VPashkov/corefx,andyhebear/corefx,josguil/corefx,stormleoxia/corefx,shimingsg/corefx,twsouthwick/corefx,Alcaro/corefx,cartermp/corefx,bpschoch/corefx,mokchhya/corefx,BrennanConroy/corefx,rubo/corefx,iamjasonp/corefx,shiftkey-tester/corefx,Chrisboh/corefx,chaitrakeshav/corefx,khdang/corefx,cnbin/corefx,seanshpark/corefx,benpye/corefx,fernando-rodriguez/corefx,zhangwenquan/corefx,stone-li/corefx,jhendrixMSFT/corefx,shrutigarg/corefx,manu-silicon/corefx,shmao/corefx,krk/corefx,fgreinacher/corefx,benjamin-bader/corefx,mmitche/corefx,claudelee/corefx,FiveTimesTheFun/corefx,dhoehna/corefx,mafiya69/corefx,khdang/corefx,benpye/corefx,jlin177/corefx,manu-silicon/corefx,xuweixuwei/corefx,rjxby/corefx,richlander/corefx,rubo/corefx,shiftkey-tester/corefx,the-dwyer/corefx,dhoehna/corefx,shimingsg/corefx,mazong1123/corefx,wtgodbe/corefx,fffej/corefx,MaggieTsang/corefx,KrisLee/corefx,the-dwyer/corefx,josguil/corefx,ptoonen/corefx,weltkante/corefx,chenxizhang/corefx,dhoehna/corefx,iamjasonp/corefx,cartermp/corefx,wtgodbe/corefx,krk/corefx,arronei/corefx,Priya91/corefx-1,mazong1123/corefx,gregg-miskelly/corefx,vs-team/corefx,mokchhya/corefx,JosephTremoulet/corefx,Petermarcu/corefx,mellinoe/corefx,gabrielPeart/corefx,kyulee1/corefx,krytarowski/corefx,vrassouli/corefx,YoupHulsebos/corefx,alexperovich/corefx,Petermarcu/corefx,the-dwyer/corefx,DnlHarvey/corefx,Frank125/corefx,dotnet-bot/corefx,larsbj1988/corefx,Yanjing123/corefx,jlin177/corefx,alphonsekurian/corefx,shmao/corefx,lggomez/corefx,Ermiar/corefx,zmaruo/corefx,vrassouli/corefx,viniciustaveira/corefx,uhaciogullari/corefx,anjumrizwi/corefx,richlander/corefx,mellinoe/corefx,lydonchandra/corefx,kyulee1/corefx,dsplaisted/corefx,marksmeltzer/corefx,ptoonen/corefx,parjong/corefx,chenkennt/corefx,ericstj/corefx,jhendrixMSFT/corefx,mazong1123/corefx,vs-team/corefx,jeremymeng/corefx,twsouthwick/corefx,pgavlin/corefx,shawnhar/corefx,s0ne0me/corefx,n1ghtmare/corefx,xuweixuwei/corefx,elijah6/corefx,akivafr123/corefx,brett25/corefx,benjamin-bader/corefx,alexandrnikitin/corefx,pallavit/corefx,YoupHulsebos/corefx,tijoytom/corefx,gkhanna79/corefx,tijoytom/corefx,misterzik/corefx,rajansingh10/corefx,the-dwyer/corefx,dtrebbien/corefx,alexperovich/corefx,nelsonsar/corefx,CherryCxldn/corefx,rubo/corefx,mafiya69/corefx,alexperovich/corefx,krytarowski/corefx,wtgodbe/corefx,zhenlan/corefx,Jiayili1/corefx,dhoehna/corefx,elijah6/corefx,fffej/corefx,gkhanna79/corefx,josguil/corefx,mokchhya/corefx,oceanho/corefx,Ermiar/corefx,billwert/corefx,contoso-dnf-a/corefx,690486439/corefx,popolan1986/corefx,JosephTremoulet/corefx,chaitrakeshav/corefx,alphonsekurian/corefx,alexandrnikitin/corefx,benjamin-bader/corefx,gregg-miskelly/corefx,scott156/corefx,FiveTimesTheFun/corefx,rubo/corefx,Ermiar/corefx,manu-silicon/corefx,ViktorHofer/corefx,erpframework/corefx,marksmeltzer/corefx,claudelee/corefx,SGuyGe/corefx,alphonsekurian/corefx,YoupHulsebos/corefx,krk/corefx,dmitry-shechtman/corefx,stone-li/corefx,vs-team/corefx,Jiayili1/corefx,tstringer/corefx,chaitrakeshav/corefx,Alcaro/corefx,viniciustaveira/corefx,andyhebear/corefx,axelheer/corefx,lggomez/corefx,shmao/corefx,rahku/corefx,ericstj/corefx,mmitche/corefx,EverlessDrop41/corefx,jmhardison/corefx,arronei/corefx,twsouthwick/corefx,ViktorHofer/corefx,mokchhya/corefx,krytarowski/corefx,Priya91/corefx-1,shimingsg/corefx,billwert/corefx,vrassouli/corefx,comdiv/corefx,shawnhar/corefx,bitcrazed/corefx,alexperovich/corefx,ViktorHofer/corefx,ravimeda/corefx,nchikanov/corefx,uhaciogullari/corefx,benpye/corefx,jlin177/corefx,contoso-dnf-a/corefx,janhenke/corefx,seanshpark/corefx,ellismg/corefx,DnlHarvey/corefx,heXelium/corefx,KrisLee/corefx,Ermiar/corefx,Jiayili1/corefx,nbarbettini/corefx,ellismg/corefx,stone-li/corefx,jhendrixMSFT/corefx,jlin177/corefx,brett25/corefx,dotnet-bot/corefx,Alcaro/corefx,mokchhya/corefx,690486439/corefx,cartermp/corefx,stephenmichaelf/corefx,SGuyGe/corefx,dkorolev/corefx,claudelee/corefx,zhangwenquan/corefx,shmao/corefx,yizhang82/corefx,PatrickMcDonald/corefx,tstringer/corefx,gkhanna79/corefx,CherryCxldn/corefx,shmao/corefx,dhoehna/corefx,n1ghtmare/corefx,richlander/corefx,kkurni/corefx,mafiya69/corefx,marksmeltzer/corefx,rahku/corefx,huanjie/corefx,seanshpark/corefx,billwert/corefx,scott156/corefx,ViktorHofer/corefx,nbarbettini/corefx,wtgodbe/corefx,stone-li/corefx,rjxby/corefx,vs-team/corefx,rahku/corefx,benpye/corefx,destinyclown/corefx,dsplaisted/corefx,comdiv/corefx,zmaruo/corefx,scott156/corefx,tstringer/corefx,matthubin/corefx,dkorolev/corefx,kkurni/corefx,n1ghtmare/corefx,Winsto/corefx,ravimeda/corefx,khdang/corefx,heXelium/corefx,cydhaselton/corefx,shrutigarg/corefx,iamjasonp/corefx,nbarbettini/corefx,weltkante/corefx,alexperovich/corefx,janhenke/corefx,shahid-pk/corefx,gkhanna79/corefx,rjxby/corefx,thiagodin/corefx,tstringer/corefx,fffej/corefx,cydhaselton/corefx,iamjasonp/corefx,thiagodin/corefx,oceanho/corefx,janhenke/corefx,shana/corefx,ptoonen/corefx,alexperovich/corefx,wtgodbe/corefx,mokchhya/corefx,rajansingh10/corefx,bpschoch/corefx,gabrielPeart/corefx,brett25/corefx,shana/corefx,nchikanov/corefx,tijoytom/corefx,vijaykota/corefx,thiagodin/corefx,rajansingh10/corefx,elijah6/corefx,vidhya-bv/corefx-sorting,gkhanna79/corefx,jcme/corefx,marksmeltzer/corefx,BrennanConroy/corefx,spoiledsport/corefx,lggomez/corefx,Ermiar/corefx,nelsonsar/corefx,nchikanov/corefx,krytarowski/corefx,krk/corefx,parjong/corefx,Winsto/corefx,s0ne0me/corefx,ptoonen/corefx,krk/corefx,benpye/corefx,stormleoxia/corefx,benjamin-bader/corefx,Priya91/corefx-1,rahku/corefx,Chrisboh/corefx,n1ghtmare/corefx,wtgodbe/corefx,yizhang82/corefx,cnbin/corefx,spoiledsport/corefx,bitcrazed/corefx,krk/corefx,shahid-pk/corefx,vidhya-bv/corefx-sorting,JosephTremoulet/corefx,BrennanConroy/corefx,dkorolev/corefx,yizhang82/corefx,pallavit/corefx,elijah6/corefx,dsplaisted/corefx,jeremymeng/corefx,PatrickMcDonald/corefx,axelheer/corefx,shahid-pk/corefx,axelheer/corefx,fernando-rodriguez/corefx,Petermarcu/corefx,erpframework/corefx,shahid-pk/corefx,ellismg/corefx,yizhang82/corefx,ericstj/corefx,uhaciogullari/corefx,Petermarcu/corefx,arronei/corefx,mafiya69/corefx,CherryCxldn/corefx,cydhaselton/corefx,claudelee/corefx,pallavit/corefx,SGuyGe/corefx,nchikanov/corefx,parjong/corefx,dtrebbien/corefx,MaggieTsang/corefx,YoupHulsebos/corefx,DnlHarvey/corefx,dotnet-bot/corefx,huanjie/corefx,JosephTremoulet/corefx,690486439/corefx,brett25/corefx,shiftkey-tester/corefx,zmaruo/corefx,jcme/corefx,Yanjing123/corefx,mmitche/corefx,alexandrnikitin/corefx,mazong1123/corefx,bitcrazed/corefx,PatrickMcDonald/corefx,josguil/corefx,gabrielPeart/corefx,Alcaro/corefx,benjamin-bader/corefx,YoupHulsebos/corefx,nbarbettini/corefx,richlander/corefx,VPashkov/corefx,SGuyGe/corefx,stephenmichaelf/corefx,weltkante/corefx,rjxby/corefx,huanjie/corefx,alphonsekurian/corefx,MaggieTsang/corefx,jlin177/corefx,fffej/corefx,nchikanov/corefx,krytarowski/corefx,rajansingh10/corefx,ravimeda/corefx,dhoehna/corefx,akivafr123/corefx,nchikanov/corefx,zhenlan/corefx,shahid-pk/corefx,heXelium/corefx,alphonsekurian/corefx,JosephTremoulet/corefx,ericstj/corefx,oceanho/corefx,DnlHarvey/corefx,weltkante/corefx,the-dwyer/corefx,jcme/corefx,anjumrizwi/corefx,jeremymeng/corefx,690486439/corefx,tijoytom/corefx,twsouthwick/corefx,axelheer/corefx,popolan1986/corefx,benpye/corefx,weltkante/corefx,matthubin/corefx,axelheer/corefx,Yanjing123/corefx,s0ne0me/corefx,axelheer/corefx,shiftkey-tester/corefx,shimingsg/corefx,alexandrnikitin/corefx,ericstj/corefx,Petermarcu/corefx,shimingsg/corefx,elijah6/corefx,mazong1123/corefx,pgavlin/corefx,destinyclown/corefx,nelsonsar/corefx,janhenke/corefx,Priya91/corefx-1,jhendrixMSFT/corefx,JosephTremoulet/corefx,lydonchandra/corefx,cydhaselton/corefx,Yanjing123/corefx,ellismg/corefx,zhenlan/corefx,comdiv/corefx,mmitche/corefx,SGuyGe/corefx,MaggieTsang/corefx,misterzik/corefx,zhangwenquan/corefx,Chrisboh/corefx,billwert/corefx,larsbj1988/corefx,690486439/corefx,jcme/corefx,matthubin/corefx,cartermp/corefx,iamjasonp/corefx,pgavlin/corefx,billwert/corefx,parjong/corefx,nbarbettini/corefx,bitcrazed/corefx,tijoytom/corefx,EverlessDrop41/corefx,larsbj1988/corefx,yizhang82/corefx,billwert/corefx,stephenmichaelf/corefx,bpschoch/corefx,jmhardison/corefx,parjong/corefx,ptoonen/corefx,jlin177/corefx,richlander/corefx,richlander/corefx,ViktorHofer/corefx,PatrickMcDonald/corefx,alexandrnikitin/corefx,tstringer/corefx,vijaykota/corefx,CloudLens/corefx,akivafr123/corefx,vrassouli/corefx,kkurni/corefx,VPashkov/corefx,zhenlan/corefx,ellismg/corefx,Jiayili1/corefx,manu-silicon/corefx,misterzik/corefx,akivafr123/corefx,huanjie/corefx,stone-li/corefx,pallavit/corefx,dmitry-shechtman/corefx,richlander/corefx,cydhaselton/corefx,khdang/corefx,twsouthwick/corefx,Yanjing123/corefx,the-dwyer/corefx,Priya91/corefx-1,shimingsg/corefx,chenxizhang/corefx,anjumrizwi/corefx,ViktorHofer/corefx,mmitche/corefx,zhenlan/corefx,jcme/corefx,YoupHulsebos/corefx,manu-silicon/corefx,Winsto/corefx,MaggieTsang/corefx,krytarowski/corefx,gregg-miskelly/corefx,EverlessDrop41/corefx,rahku/corefx,billwert/corefx,mazong1123/corefx,rjxby/corefx,rahku/corefx,twsouthwick/corefx,josguil/corefx,ravimeda/corefx,pgavlin/corefx,Chrisboh/corefx,shrutigarg/corefx,jlin177/corefx,kkurni/corefx,jmhardison/corefx,pallavit/corefx,twsouthwick/corefx,ptoonen/corefx,chenxizhang/corefx,zhenlan/corefx,Petermarcu/corefx,Petermarcu/corefx,jhendrixMSFT/corefx,vidhya-bv/corefx-sorting,fgreinacher/corefx,pallavit/corefx,khdang/corefx,shimingsg/corefx,stormleoxia/corefx,mafiya69/corefx,gkhanna79/corefx,vidhya-bv/corefx-sorting,weltkante/corefx,janhenke/corefx,Jiayili1/corefx,adamralph/corefx,n1ghtmare/corefx,fgreinacher/corefx,shawnhar/corefx,gkhanna79/corefx,ellismg/corefx,KrisLee/corefx,mellinoe/corefx,VPashkov/corefx,andyhebear/corefx,stone-li/corefx,dotnet-bot/corefx,stephenmichaelf/corefx,khdang/corefx,Chrisboh/corefx,kkurni/corefx,cnbin/corefx,KrisLee/corefx,PatrickMcDonald/corefx,gabrielPeart/corefx,viniciustaveira/corefx,bitcrazed/corefx,mazong1123/corefx,weltkante/corefx,lggomez/corefx,janhenke/corefx,ravimeda/corefx,nelsonsar/corefx,stephenmichaelf/corefx,erpframework/corefx,mellinoe/corefx,shana/corefx,akivafr123/corefx,seanshpark/corefx,kyulee1/corefx,elijah6/corefx,shahid-pk/corefx,JosephTremoulet/corefx,nbarbettini/corefx,lggomez/corefx,dkorolev/corefx