* Remove DLObject virtual methods allocSegment and freeSegment.
As long as all DLObject implementations use memalign + free to
allocate/release segments, there is no point in wrapping those.
This enables further simplifications.
* Add TemplatedELFPlugin template class. Use this instead of explicit
ELFPlugin subclasses.
* Rename DLObject::discard_symtab to discardSymtab
svn-id: r54082
