[llvm] [z/OS] Mark 18 tests UNSUPPORTED on z/OS due to an issue in printf. (PR #196391)

[Sean Perry via llvm-commits]

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@@ -1,5 +1,10 @@
 ## Verify that --add-section warns on invalid note sections.
 
+## On z/OS, ebcdic output from printf is converted into utf-8 as
+## the output being redirected, causing the values to be incorrect.
+## TODO: use a builtin version of printf
+UNSUPPORTED: system-zos
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perry-ca wrote:

Still needs the `#`.

https://github.com/llvm/llvm-project/pull/196391