[llvm] [BOLT][DWARF] Cleanup buffer initialization for DWO range writer (PR #97843)

[Alexander Yermolovich via llvm-commits]

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@@ -652,6 +652,7 @@ void DWARFRewriter::updateDebugInfo() {
         auto LegacyRangesSectionWriterByCU =
             std::make_unique<DebugRangesSectionWriter>();
         LegacyRangesSectionWriterByCU->initSection(CU);
+        LegacyRangesSectionWriterByCU->clearBuffer();
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ayermolo wrote:

Can we not create empty ranges to begin with?

https://github.com/llvm/llvm-project/pull/97843