libobs: Add Windows bitness/arch to crash handler

Commit aa899c2 (PR #603) added Windows bitness/arch to regular logs.
This adds it to the crash logs.

Closes jp9000/obs-studio#690
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Internal Server Error - Gitea: Git with a cup of tea
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Gitea Version: 1.28.0+dev-477-g8b6ad49a5f