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

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> The sanitizer-windows buildbot (https://lab.llvm.org/buildbot/#/builders/107/builds/11815) has been red ever since this was merged. It looks like it might be incorrectly comparing clang against the MSVC output?

@davidmrdavid has no commit access

@qinkunbao Instead of compilcated "if then els"
can you just switch to simple CHECK with regex: {{message|message2}} ?


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