-g broken for DWARF2 on x86 platforms

[Robert Lipe]

> Tue Nov 25 22:43:30 1997  Jason Merrill  <jason@yorick.cygnus.com>
> 
> 	* dwarfout.c (output_type): If finalizing, write out nested types 
> 	of types we've already written.

I don't know if it really, really does the right right thing (i.e. I
didn't test that a debugger can read the output) but applying this
patch and performing a 'make bootstrap3' on the most recent egcs
snapshot does allow the libio and libstdc++ tests to run to (largely) 
successful completion on i586-pc-sco3.2v5.0.4 in ELF mode which uses
dwarf.

Thanx much, Jason!

RJL