[llvm] [win] Fix EH Cont Guard targets when SEH personality is used (PR #129612)

[Reid Kleckner via llvm-commits]

rnk wrote:

I think I was in a rush so I forgot to mention, yes, this seems like a good change, thanks for doing the rename to make it consistent. :)

https://github.com/llvm/llvm-project/pull/129612