Match up NewMultiDimArray with AllocateArrayEx in CLR (#2237)
Match up NewMultiDimArray with AllocateArrayEx in CLR (#2237)

* Match up NewMultiDimArray with AllocateArrayEx in CLR

The `JIT\Directed\newarr\newarr.cs` test is unhappy about our exception
types.
gregkalapos/corert,gregkalapos/corert,krytarowski/corert,yizhang82/corert,botaberg/corert,sandreenko/corert,yizhang82/corert,tijoytom/corert,krytarowski/corert,yizhang82/corert,tijoytom/corert,botaberg/corert,krytarowski/corert,sandreenko/corert,gregkalapos/corert,gregkalapos/corert,sandreenko/corert,tijoytom/corert,botaberg/corert,shrah/corert,shrah/corert,shrah/corert,botaberg/corert,sandreenko/corert,yizhang82/corert,tijoytom/corert,shrah/corert,krytarowski/corert