[Bug target/109558] bpf: support BTF and DWARF tag annotations for BPF

[david.faust at oracle dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109558

--- Comment #2 from David Faust <david.faust at oracle dot com> ---
Patches for btf_type_tag WIP, but DWARF for type_tags in certain cases is
incorrect seemingly due to PR debug/110439.  I am still investigating.

  https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110439