[PATCH] D139444: [ZOS] Convert tests to check 'target={{.*}}-zos'

[Kai Nacke via Phabricator via cfe-commits]

Kai added a comment.

In D139444#3982205 <https://reviews.llvm.org/D139444#3982205>, @probinson wrote:

> If you can tell me the `platform.system()` value to look for to detect z/OS, I can do that.  Probably as a separate patch, as it would be going beyond the mechanical replacement that I'm doing for everything else.

On z/OS, `platform.system()` returns `OS/390`.


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https://reviews.llvm.org/D139444