Support for LLVM on Windows

Hi guys, first of all great job with this repo, plenty of fabulous ideas 👍

Are you open to adding support of binary logger 2 stage build working on Windows usnig LLVM? I could create PR with required changes.

Some changes in `gen_str_catalog.py` were needed in my project, seems like GCC/Linux do some things differently

1. Handle `__cdecl` in the regex or strip it before parsing
2. Handle `(void)` as synonym for `()` in symbol names
3. Handle elaborated type specifiers (`struct`/`class`) in demangled output
4. Use greedy `.+` instead of lazy `.+?` for nested template argument capture