[lld] [lld][macho] Support order cstrings with -order_file_cstring (PR #140307)

[Snehasish Kumar via llvm-commits]

snehasish wrote:

> > Overall looks good to me.
> 
> @snehasish thanks for reviewing and accepting the patch! Could you please also help me merge the PR? (I don't have permission to merge yet)

I would be happy to but lets wait for @ellishg to approve the change. Also let's give LLD owners this week to chime in if they have any concerns. Ping me next Monday again if you need me to merge it. Thanks for working on this change! 

https://github.com/llvm/llvm-project/pull/140307