[Clang][Bundler][NFC] Replace SmallString<...> with StringRef

[ABataev]

LG

clang/tools/clang-offload-bundler/ClangOffloadBundler.cpp

Error WriteBundleEnd(raw_fd_ostream &OS, StringRef TargetTriple) final {
     // to pass down to llvm-objcopy.
     OS.close();
 
     // Temporary files that need to be removed.
     TempFileHandlerRAII TempFiles;
 
     // Create an intermediate temporary file to save object after the first
     // llvm-objcopy run.
-    Expected<SmallString<128u>> IntermediateObjOrErr = TempFiles.Create(None);
+    Expected<StringRef> IntermediateObjOrErr = TempFiles.Create(None);
     if (!IntermediateObjOrErr)
       return IntermediateObjOrErr.takeError();
-    const SmallString<128u> &IntermediateObj = *IntermediateObjOrErr;
+    StringRef IntermediateObj = *IntermediateObjOrErr;
 
     // Compose llvm-objcopy command line for add target objects' sections.
     BumpPtrAllocator Alloc;
     StringSaver SS{Alloc};
     SmallVector<StringRef, 8u> ObjcopyArgs{"llvm-objcopy"};
     for (unsigned I = 0; I < NumberOfInputs; ++I) {
       StringRef InputFile = InputFileNames[I];
       if (I == HostInputIndex) {