LDC Windows exception handling

[dsimcha]

== Quote from Christian Kamm (kamm-incasoftware at removethis.de)'s article
> > Speaking of LDC, any chance that the exception handling on Win32 gets
> > fixed in the near future?
> No, unfortunately.
> It's a problem with LLVM only supporting Dwarf2 exception handling. I'm
> pretty sure it'd work if we used ELF for the object files and GCC for
> linking, but Windows people tell me this is hardly acceptable.

I think this solution is much better than nothing.  I assume it would at least
work ok on standalone-type projects.