Support for LLVM on Windows

[jimarcin]

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

[elbeno]

Hi, sure, I think that would be fine. Thanks.

To make sure it keeps working, we can add some regex tests with representative samples from undefined.txt on clang (Linux), clang (Windows) and GCC.

[lukevalenty]

"Use greedy .+ instead of lazy .+? for nested template argument capture"

This gets a little tricky... @elbeno, @mjcaisse-intel , we should consider using a grammar instead of regex to robustly parse template types.