Introduces the pw_build_info module, and adds support for reading GNU
build IDs from python and from inside the context of a C++ application.
Change-Id: I105627cffff28f5a6a2dbdf396be34143b0637d9
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/53760
Reviewed-by: Wyatt Hepler <hepler@google.com>
Reviewed-by: Ewout van Bekkum <ewout@google.com>
Commit-Queue: Armando Montanez <amontanez@google.com>
