[MCMachOStreamer] Properly reset CreatedADWARFSection

[loladiro]

Summary

Without this, a PassManager can not be reused for multiple modules in a row when emitting debug info on MachO.

[yaron.keren]

We have been fixed such bugs before, usually when a data member is added to one of the Streamers, so LGTM.

[• rafael]

LGTM

[loladiro]

Turns out @bogner already committed this in the meantime. I'll still go ahead and add a test based on D14965.

lib/MC/MCMachOStreamer.cpp

public:
   MCMachOStreamer(MCContext &Context, MCAsmBackend &MAB, raw_pwrite_stream &OS,
                   MCCodeEmitter *Emitter, bool DWARFMustBeAtTheEnd, bool label)
       : MCObjectStreamer(Context, MAB, OS, Emitter), LabelSections(label),
         DWARFMustBeAtTheEnd(DWARFMustBeAtTheEnd), CreatedADWARFSection(false) {}
 
   /// state management
   void reset() override {
     HasSectionLabel.clear();
+    CreatedADWARFSection = false;
     MCObjectStreamer::reset();
   }
 
   /// @name MCStreamer Interface
   /// @{
 
   void ChangeSection(MCSection *Sect, const MCExpr *Subsect) override;
   void EmitLabel(MCSymbol *Symbol) override;