[lld][macho] Rename test to fix spelling (llvm#160938)

The test name had a typo from
llvm#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.

Author: ellishg

lld/MachO/SyntheticSections.cpp

@@ -1687,6 +1687,9 @@ void CStringSection::writeTo(uint8_t *buf) const {
 
 void CStringSection::finalizeContents() {
   uint64_t offset = 0;
+  // TODO: Call buildCStringPriorities() to support cstring ordering when
+  // deduplication is off, although this may negatively impact build
+  // performance.
   for (CStringInputSection *isec : inputs) {
     for (const auto &[i, piece] : llvm::enumerate(isec->pieces)) {
       if (!piece.live)