Fix handling of callvirt to a non-slot defining methods (#2636)
Fix handling of callvirt to a non-slot defining methods (#2636)

This turned out to be less of a perf hit than I thought it would be.

Fixes #2392.
shrah/corert,gregkalapos/corert,shrah/corert,yizhang82/corert,botaberg/corert,krytarowski/corert,tijoytom/corert,sandreenko/corert,krytarowski/corert,botaberg/corert,sandreenko/corert,krytarowski/corert,sandreenko/corert,gregkalapos/corert,tijoytom/corert,yizhang82/corert,gregkalapos/corert,botaberg/corert,krytarowski/corert,sandreenko/corert,yizhang82/corert,tijoytom/corert,botaberg/corert,shrah/corert,shrah/corert,tijoytom/corert,gregkalapos/corert,yizhang82/corert