[llvm] [XCOFF][OBJECT] get symbol size by calling XCOFF interfaces (PR #67304)

[Chen Zheng via llvm-commits]

chenzheng1030 wrote:

> Please could you make a small patch (no PR necessary unless you're uncertain about anything) to address this and my other comments.

Thanks, 8c369eb4965a1799960872cd65e85b284b97784c is committed to address your code format comments.

https://github.com/llvm/llvm-project/pull/67304