Fix skipcrossgen option (#12650)
Fix skipcrossgen option (#12650)

* Fix skipcrossgen option

* Use return instead of exit

wateret/coreclr,mskvortsov/coreclr,kyulee1/coreclr,ruben-ayrapetyan/coreclr,JonHanna/coreclr,parjong/coreclr,tijoytom/coreclr,mmitche/coreclr,botaberg/coreclr,wtgodbe/coreclr,russellhadley/coreclr,dpodder/coreclr,cydhaselton/coreclr,tijoytom/coreclr,kyulee1/coreclr,hseok-oh/coreclr,hseok-oh/coreclr,russellhadley/coreclr,kyulee1/coreclr,cshung/coreclr,YongseopKim/coreclr,tijoytom/coreclr,botaberg/coreclr,parjong/coreclr,mmitche/coreclr,gkhanna79/coreclr,parjong/coreclr,mmitche/coreclr,cshung/coreclr,dpodder/coreclr,yizhang82/coreclr,YongseopKim/coreclr,ragmani/coreclr,ruben-ayrapetyan/coreclr,ruben-ayrapetyan/coreclr,AlexGhiondea/coreclr,hseok-oh/coreclr,krk/coreclr,kyulee1/coreclr,JosephTremoulet/coreclr,cydhaselton/coreclr,wtgodbe/coreclr,poizan42/coreclr,JonHanna/coreclr,rartemev/coreclr,krk/coreclr,gkhanna79/coreclr,krk/coreclr,kyulee1/coreclr,mskvortsov/coreclr,russellhadley/coreclr,JosephTremoulet/coreclr,JonHanna/coreclr,YongseopKim/coreclr,dpodder/coreclr,tijoytom/coreclr,JosephTremoulet/coreclr,JosephTremoulet/coreclr,cshung/coreclr,hseok-oh/coreclr,parjong/coreclr,wateret/coreclr,ruben-ayrapetyan/coreclr,ragmani/coreclr,russellhadley/coreclr,krk/coreclr,poizan42/coreclr,yizhang82/coreclr,russellhadley/coreclr,AlexGhiondea/coreclr,JonHanna/coreclr,cydhaselton/coreclr,botaberg/coreclr,AlexGhiondea/coreclr,krk/coreclr,poizan42/coreclr,parjong/coreclr,JonHanna/coreclr,wtgodbe/coreclr,YongseopKim/coreclr,JonHanna/coreclr,poizan42/coreclr,hseok-oh/coreclr,wateret/coreclr,mmitche/coreclr,cydhaselton/coreclr,cshung/coreclr,yizhang82/coreclr,yizhang82/coreclr,cshung/coreclr,mskvortsov/coreclr,botaberg/coreclr,tijoytom/coreclr,dpodder/coreclr,mskvortsov/coreclr,botaberg/coreclr,ragmani/coreclr,wateret/coreclr,kyulee1/coreclr,gkhanna79/coreclr,AlexGhiondea/coreclr,gkhanna79/coreclr,wtgodbe/coreclr,wateret/coreclr,rartemev/coreclr,poizan42/coreclr,gkhanna79/coreclr,YongseopKim/coreclr,ragmani/coreclr,cydhaselton/coreclr,mskvortsov/coreclr,yizhang82/coreclr,dpodder/coreclr,tijoytom/coreclr,ragmani/coreclr,cshung/coreclr,rartemev/coreclr,hseok-oh/coreclr,russellhadley/coreclr,poizan42/coreclr,YongseopKim/coreclr,dpodder/coreclr,JosephTremoulet/coreclr,wtgodbe/coreclr,wateret/coreclr,wtgodbe/coreclr,mmitche/coreclr,AlexGhiondea/coreclr,cydhaselton/coreclr,ruben-ayrapetyan/coreclr,JosephTremoulet/coreclr,rartemev/coreclr,parjong/coreclr,gkhanna79/coreclr,rartemev/coreclr,AlexGhiondea/coreclr,rartemev/coreclr,ragmani/coreclr,ruben-ayrapetyan/coreclr,botaberg/coreclr,mmitche/coreclr,mskvortsov/coreclr,yizhang82/coreclr,krk/coreclr