This includes the enhanced export/import scripts and the class fixup
script (with the name mangler being used implicitly). With this, the
switchover from simple label-based sharing of Ghidra project information
to rich type and class information is complete.
This introduces its own issues, but without namespaces, symbol names end
up repeated and delinking fails. The delinked symbols also end up
without namespaces, introducing yet more problems. This is an
improvement for now, but we'll need proper namespace importing into
Ghidra at some point.
