[lld] [lld][MachO] Read cstring order for non deduped sections (PR #161879)

[via llvm-commits]

SharonXSharon wrote:

> Create cStringPriorities, separate from priorities, to hold only priorities for cstring pieces

On https://github.com/llvm/llvm-project/pull/140307, i was originally using a separate cStringPriorities and , but was suggested to use a unified structure, so are we proposing keeping the one `-order_file` input but processing regular symbol and cstring separately depending on the entry? 


https://github.com/llvm/llvm-project/pull/161879