Fix enforcepgo option in netci.groovy
Fix enforcepgo option in netci.groovy

The windows release builds are broken because they call build with
enforcepgo instead of -enforcepgo. This change fixes the parameter.

krk/coreclr,poizan42/coreclr,JosephTremoulet/coreclr,cshung/coreclr,krk/coreclr,mmitche/coreclr,yizhang82/coreclr,ruben-ayrapetyan/coreclr,wtgodbe/coreclr,krk/coreclr,poizan42/coreclr,ruben-ayrapetyan/coreclr,mmitche/coreclr,cshung/coreclr,poizan42/coreclr,yizhang82/coreclr,wateret/coreclr,poizan42/coreclr,mmitche/coreclr,wtgodbe/coreclr,wtgodbe/coreclr,JosephTremoulet/coreclr,mmitche/coreclr,ruben-ayrapetyan/coreclr,wtgodbe/coreclr,yizhang82/coreclr,wateret/coreclr,wateret/coreclr,wateret/coreclr,mmitche/coreclr,JosephTremoulet/coreclr,wtgodbe/coreclr,wateret/coreclr,wateret/coreclr,cshung/coreclr,wtgodbe/coreclr,krk/coreclr,JosephTremoulet/coreclr,ruben-ayrapetyan/coreclr,ruben-ayrapetyan/coreclr,cshung/coreclr,ruben-ayrapetyan/coreclr,yizhang82/coreclr,yizhang82/coreclr,krk/coreclr,cshung/coreclr,poizan42/coreclr,yizhang82/coreclr,poizan42/coreclr,mmitche/coreclr,JosephTremoulet/coreclr,krk/coreclr,JosephTremoulet/coreclr,cshung/coreclr