[llvm] [z/OS] Modify regex in error message to match on z/OS. (PR #194020)

[via llvm-commits]

sujianIBM wrote:

> I'm not familiar enough with the lit testsuite setup as to whether it's possible to add it as a substitution that can be used in the tests for lit itself, like with the LLVM tests, sorry. Perhaps @boomanaiden154 can advise. If it is, I think we should add it. I don't think we should add it as a "standard" substitution that is supported for all lit users.

Thank you very much for your reply!
I am not familiar with the lit tool itself too much so I am not sure whether it can be done and how to do it.
I wonder does it (I mean adding the substitution if it is possible) need to be part of this PR?
Thanks!   



https://github.com/llvm/llvm-project/pull/194020