message: [SymbolFile] Update after SymbolVendor API change
  r368001 removed the passthrough buttons from SymbolVendor, so use
  SymbolFile directly instead.
diff: @@ -280,8 +280,8 @@ void DWARFASTParserSwift::GetClangType(const DWARFDIE &die,
  for (const auto &name_module : sym_file.getExternalTypeModules()) {
  if (!name_module.second)
  continue;
  - SymbolVendor *sym_vendor = name_module.second->GetSymbolVendor();
  - if (sym_vendor->FindTypes(decl_context, true, clang_types))
  + SymbolFile *sym_file = name_module.second->GetSymbolFile();
  + if (sym_file->FindTypes(decl_context, true, clang_types))
  return;
  }
  