Add missing math functions
Add missing math functions

[tfs-changeset: 1652564]

yizhang82/corert,yizhang82/corert,yizhang82/corert,gregkalapos/corert,tijoytom/corert,krytarowski/corert,shrah/corert,shrah/corert,krytarowski/corert,gregkalapos/corert,botaberg/corert,shrah/corert,krytarowski/corert,tijoytom/corert,yizhang82/corert,botaberg/corert,tijoytom/corert,shrah/corert,botaberg/corert,tijoytom/corert,krytarowski/corert,gregkalapos/corert,gregkalapos/corert,botaberg/corert