[lld][macho] Rename test to fix spelling (#160938)
The test name had a typo from
https://github.com/llvm/llvm-project/pull/140307. Fix it.
I realized cstring ordering is not supported when string deduplication
is turned off. We could easily call `buildCStringPriorities()` in
`CStringSection::finalizeContents()`, but I worry it might harm build
performance since it creates multiple vectors and searches though maps.
If users are not deduplicating strings, they probably won't care to
order them, but it would be good to support this.
