Log the crossgen command in build.sh.
Log the crossgen command in build.sh.

This makes it easier to copy paste the commnand if it fails.

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