[llvm] [llvm][yaml2obj] Modify section header overriding timing (PR #130942)

[Ruoyu Qiu via llvm-commits]

cabbaken wrote:

Thank you for your thoughtful reply, I will read and verify these patches over the weekend. 
Please let me add a test about the order of  `shOffset` and `Offset` for now.

https://github.com/llvm/llvm-project/pull/130942