Summary:
I noticed the latest homebrew macOS OSS build does not resolve Python frames in
backtrace. It turns out that we need to match the underscore versions of the
function names. See the added comment.

Reviewed By: muirdm

Differential Revision: D106095666

fbshipit-source-id: 9bc6fcf1eeba77f4d561f32b5a128ea5a16295c3