[Soot-list] patch to allow adding application class during BodyTransformer

[Patrick Lam]

Hi Phil,

Could you use a snapshotIterator instead of manually duplicating the 
list? Soot maintains the list of classes as a Chain, which provides 
snapshotIterator to do what your iteratorToList method did.

Also, could you assure me that you're not slowing down Soot too much 
with this change? I think it'll be OK: this list will contain on the 
order of 2000 elements, but there are only a dozen packs. But let's just 
check to make sure.

pat