Updated the error message for missing dia sdk in build.cmd. Closes #25856 (#25859)
Updated the error message for missing dia sdk in build.cmd. Closes #25856 (#25859)


shimingsg/corefx,wtgodbe/corefx,axelheer/corefx,axelheer/corefx,BrennanConroy/corefx,mmitche/corefx,axelheer/corefx,wtgodbe/corefx,ptoonen/corefx,ViktorHofer/corefx,ravimeda/corefx,ptoonen/corefx,ravimeda/corefx,Jiayili1/corefx,Jiayili1/corefx,zhenlan/corefx,ViktorHofer/corefx,wtgodbe/corefx,Jiayili1/corefx,shimingsg/corefx,Ermiar/corefx,ericstj/corefx,zhenlan/corefx,Jiayili1/corefx,zhenlan/corefx,ericstj/corefx,ptoonen/corefx,mmitche/corefx,ravimeda/corefx,ravimeda/corefx,wtgodbe/corefx,ptoonen/corefx,mmitche/corefx,zhenlan/corefx,Ermiar/corefx,axelheer/corefx,axelheer/corefx,wtgodbe/corefx,zhenlan/corefx,axelheer/corefx,ptoonen/corefx,ViktorHofer/corefx,ViktorHofer/corefx,Jiayili1/corefx,shimingsg/corefx,shimingsg/corefx,ravimeda/corefx,ericstj/corefx,wtgodbe/corefx,zhenlan/corefx,Ermiar/corefx,ptoonen/corefx,ViktorHofer/corefx,shimingsg/corefx,ericstj/corefx,BrennanConroy/corefx,wtgodbe/corefx,ptoonen/corefx,ViktorHofer/corefx,zhenlan/corefx,mmitche/corefx,ravimeda/corefx,mmitche/corefx,Ermiar/corefx,Jiayili1/corefx,ericstj/corefx,ericstj/corefx,mmitche/corefx,ericstj/corefx,shimingsg/corefx,Ermiar/corefx,shimingsg/corefx,ViktorHofer/corefx,Ermiar/corefx,ravimeda/corefx,Jiayili1/corefx,Ermiar/corefx,mmitche/corefx,BrennanConroy/corefx