gdb/dwarf: pass dwarf2_per_bfd to dwarf2_per_cu_data constructor

Pass a dwarf2_per_bfd to the constructor of dwarf2_per_cu_data and set
the per_bfd field there.  All "real" instantiations of
dwarf2_per_cu_data must have a valid, non-nullptr dwarf2_per_bfd
backlink, this makes it a bit more obvious.  The instantiations of
dwarf2_per_cu_data that receive a nullptr dwarf2_per_bfd are the ones
used to do hash map lookups and the ones used in selftests.

Remove an unnecessary assignment of per_bfd in
fill_in_sig_entry_from_dwo_entry: the per_bfd field is already set when
the signatured_type object is constructor (before that, it was set in
allocate_signatured_type).

Change-Id: Ifeebe55fdb1bc2de4de9c852033fafe8abdfde8a
Approved-By: Tom Tromey <tom@tromey.com>

0 files changed, 0 insertions, 0 deletions