dwarf_loader: Initial support for DW_TAG_unspecified_type

Still need to check what to fprintf for this, but at least have it in
the type lists so that we can find it.

Reported-by: Christophe Fergeau <cfergeau@redhat.com>
Cc: Dodji Seketeli <dodji@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
3 files changed