Make ThreadSafeFlags public
Make ThreadSafeFlags public

These are consumed from the ECMA type system implementation and need to
be public.

mjp41/corert,krytarowski/corert,shrah/corert,manu-silicon/corert,tijoytom/corert,manu-silicon/corert,mjp41/corert,manu-silicon/corert,yizhang82/corert,schellap/corert,schellap/corert,sandreenko/corert,botaberg/corert,gregkalapos/corert,tijoytom/corert,shrah/corert,yizhang82/corert,krytarowski/corert,kyulee1/corert,yizhang82/corert,gregkalapos/corert,mjp41/corert,kyulee1/corert,manu-silicon/corert,kyulee1/corert,mjp41/corert,botaberg/corert,krytarowski/corert,gregkalapos/corert,tijoytom/corert,mjp41/corert,yizhang82/corert,sandreenko/corert,manu-silicon/corert,botaberg/corert,schellap/corert,shrah/corert,shrah/corert,krytarowski/corert,kyulee1/corert,tijoytom/corert,gregkalapos/corert,schellap/corert,sandreenko/corert,botaberg/corert,sandreenko/corert,schellap/corert