[llvm] Fix compress/decompress in LLVM Offloading API (PR #150064)

[James Henderson via llvm-commits]

================
@@ -62,7 +62,7 @@ Error extractOffloadBundle(MemoryBufferRef Contents, uint64_t SectionOffset,
         return createFileError(FileName, EC);
 
       Expected<std::unique_ptr<MemoryBuffer>> DecompressedBufferOrErr =
-          CompressedOffloadBundle::decompress(**CodeOrErr, false, errs());
+          CompressedOffloadBundle::decompress(**CodeOrErr, &nulls());
----------------
jh7370 wrote:

```suggestion
          CompressedOffloadBundle::decompress(**CodeOrErr, nullptr);
```
Surely?

`nulls()` is still an object; it just doesn't print to anything, so this will result in the verbose printing logic still being executed. Of course, if there's no real issue doing so, we could make `VerboseStream` a reference and just past passing in `nulls()` as appropriate. (I forgot we had `nulls()` or I'd have mentioned it before).

https://github.com/llvm/llvm-project/pull/150064