Implements serialization for Exception and updates testing to match, since ArgumentException can't be serialized.
Implements serialization for Exception and updates testing to match, since ArgumentException can't be serialized.

[tfs-changeset: 1665411]

yizhang82/corert,shrah/corert,yizhang82/corert,gregkalapos/corert,gregkalapos/corert,gregkalapos/corert,gregkalapos/corert,yizhang82/corert,yizhang82/corert,shrah/corert,shrah/corert,shrah/corert