[llvm] [XCOFF][obj2yaml] Support SymbolAlignmentAndType as 2 separate fields in YAML. (PR #76828)

[James Henderson via llvm-commits]

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+## Check that obj2yaml can parse SymbolAlignmentAndType, SymbolAlignment, and SymbolType.
+
+# RUN: yaml2obj %s --docnum=1 -o %t32
+# RUN: obj2yaml %t32 | FileCheck %s --check-prefix=CHECK32
+
+# CHECK32:      --- !XCOFF
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jh7370 wrote:

This test is about specific fields. You don't need to check the rest of the output; just enough to show that the field values are correct and are referring to the right symbol.

https://github.com/llvm/llvm-project/pull/76828