message: [ClangASTSource] Remove divergence between upstream and swift-lldb.
diff: @@ -599,14 +599,11 @@ void ClangASTSource::FindExternalLexicalDecls(
  }
  if (TagDecl *original_tag_decl = dyn_cast<TagDecl>(original_decl)) {
  - if (original_tag_decl->hasExternalLexicalStorage() ||
  - original_tag_decl->hasExternalVisibleStorage()) {
  ExternalASTSource *external_source = original_ctx->getExternalSource();
  if (external_source)
  external_source->CompleteType(original_tag_decl);
  }
  - }
  const DeclContext *original_decl_context =
  dyn_cast<DeclContext>(original_decl);
  