[SystemZ][z/OS] Open YAML text files as text

[abhina.sreeskantharajan]

Summary

This patch sets the YAML file as text instead of binary.

llvm/tools/obj2yaml/obj2yaml.cpp

int main(int argc, char *argv[]) {
   InitLLVM X(argc, argv);
   cl::HideUnrelatedOptions(Cat);
   cl::ParseCommandLineOptions(
       argc, argv, "Dump a YAML description from an object file", nullptr,
       nullptr, /*LongOptionsUseDoubleDash=*/true);
 
   std::error_code EC;
   std::unique_ptr<ToolOutputFile> Out(
-      new ToolOutputFile(OutputFilename, EC, sys::fs::OF_None));
+      new ToolOutputFile(OutputFilename, EC, sys::fs::OF_Text));
   if (EC) {
     WithColor::error(errs(), "obj2yaml")
         << "failed to open '" + OutputFilename + "': " + EC.message() << '\n';
     return 1;
   }
   if (Error Err = dumpInput(InputFilename, Out->os())) {
     reportError(InputFilename, std::move(Err));
     return 1;
   }
   Out->keep();
 
   return 0;
 }