[llvm] [llvm-symbolizer] Recognize AIX big archive (PR #150401)

[James Henderson via llvm-commits]

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@@ -31,8 +31,8 @@ def color_EQ : Joined<["--"], "color=">, HelpText<"Whether to use color when sym
 defm debug_file_directory : Eq<"debug-file-directory", "Path to directory where to look for debug files">, MetaVarName<"<dir>">;
 defm debuginfod : B<"debuginfod", "Use debuginfod to find debug binaries", "Don't use debuginfod to find debug binaries">;
 defm default_arch
-    : Eq<"default-arch", "Default architecture (for multi-arch objects)">,
-      Group<grp_mach_o>;
+    : Eq<"default-arch", "Default architecture for multi-arch containers (Mach-O objects or AIX archives)">,
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jh7370 wrote:

```suggestion
    : Eq<"default-arch", "Default architecture for multi-arch containers (e.g. Mach-O objects or AIX archives)">,
```

https://github.com/llvm/llvm-project/pull/150401