[Bug debug/37237] Debug information for virtual destructors omits DW_AT_vtable_elem_location

[tromey at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37237

--- Comment #13 from Tom Tromey <tromey at gcc dot gnu.org> ---
I was debugging this today:
https://sourceware.org/bugzilla/show_bug.cgi?id=15975

... and ran across this PR again.
GCC is still emitting a virtual destructor with no indication of
its vtable element location:

 <2><37c>: Abbrev Number: 18 (DW_TAG_subprogram)
    <37d>   DW_AT_external    : 1    
    <37d>   DW_AT_name        : ~B    
    <380>   DW_AT_decl_file   : 1    
    <381>   DW_AT_decl_line   : 23    
    <382>   DW_AT_virtuality  : 1    (virtual)
    <383>   DW_AT_containing_type: <0x33d>    
    <387>   DW_AT_declaration : 1    
    <387>   DW_AT_object_pointer: <0x38b>