[compiler-rt] Augment `uncaught-exception.test` fuzzer test to be msvc-compatible (PR #125924)

[Qinkun Bao via llvm-commits]

qinkunbao wrote:

> can you just switch to simple CHECK with regex: {{message|message2}} ?
Will work on a PR to fix the failure

https://github.com/llvm/llvm-project/pull/125924