MachObjectWrite::reset: clear SectionAddress and SectionOrder

Otherwise llvm/test/MC/MachO/empty-twice.ll might fail.

Fixes: 7840c00 ("[MC] Move MCAsmLayout::SectionOrder to MachObjectWriter::SectionOrder")

Author: MaskRay

llvm/lib/MC/MachObjectWriter.cpp

@@ -48,6 +48,8 @@ using namespace llvm;
 void MachObjectWriter::reset() {
   Relocations.clear();
   IndirectSymBase.clear();
+  SectionAddress.clear();
+  SectionOrder.clear();
   StringTable.clear();
   LocalSymbolData.clear();
   ExternalSymbolData.clear();