[ELF] Reset two member variables in Ctx::reset

Otherwise they are dangling if lldMain is called more than once.

Author: MaskRay

lld/ELF/Driver.cpp

@@ -104,7 +104,9 @@ void Ctx::reset() {
   nonPrevailingSyms.clear();
   whyExtractRecords.clear();
   backwardReferences.clear();
+  auxiliaryFiles.clear();
   hasSympart.store(false, std::memory_order_relaxed);
+  hasTlsIe.store(false, std::memory_order_relaxed);
   needsTlsLd.store(false, std::memory_order_relaxed);
   scriptSymOrderCounter = 1;
   scriptSymOrder.clear();