Change the name of ArrayBoundsException in druntime

[Robert Fraser]

Andrei Alexandrescu wrote:
>             r.tellFailed( e.toString );

Now that's just wrong. toString should be used for internal debugging 
purposes. If there's a recoverable error and you want to show it to the 
user, in a big product, it will need to be internationalized. The worry 
about what language to display the string in should not be given to the 
exception thrower, it should be given to the catcher.