[llvm] [SystemZ][z/OS] yaml2obj GOFF symbols (PR #75971)

[James Henderson via llvm-commits]

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@@ -1,5 +1,7 @@
 # RUN: yaml2obj %s | od -v -An -tx1 | FileCheck --ignore-case %s
 
+## This tests contains a symbol where none of the optional fields are set.
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jh7370 wrote:

```suggestion
## This tests a symbol where none of the optional fields are set.
```

https://github.com/llvm/llvm-project/pull/75971