DWARF-5 .debug_names DW_IDX_type_unit fix
The .debug_names completely misses its support as it did not even produce
DW_IDX_type_unit.
gdb/ChangeLog
2017-12-14 Jan Kratochvil <jan.kratochvil@redhat.com>
* dwarf2read.c (dw2_debug_names_iterator::next): Support
DW_IDX_type_unit.
(debug_names::dwarf5_offset_size, unit_kind): New.
(debug_names::insert): Add parameter kind.
(debug_names::build): Support DW_IDX_type_unit.
(debug_names::recursively_write_psymbols): Update
(debug_names::write_psymbols caller.
(debug_names::write_one_signatured_type_data)
(debug_names::write_one_signatured_type): New.
(debug_names::index_key, debug_names::symbol_value)
(debug_names::write_psymbols): Add kind.
(debug_names::write_one_signatured_type): New.
(write_debug_names): Move dwarf5_offset_size to debug_names.
Use debug_names::write_one_signatured_type for type units.