message: [ASTImporter] Set MustBuildLookupTable on PrimaryContext
  Summary: SetMustBuildLookupTable() must always be called on a primary context.
  Reviewers: labath, shafik, a.sidorin
  Subscribers: rnkovacs, dkrupp, Szelethus, gamesh411
diff: @@ -1050,7 +1050,7 @@ clang::Decl *ClangASTImporter::Minion::Imported(clang::Decl *from,
  TagDecl *to_tag_decl = dyn_cast<TagDecl>(to);
  to_tag_decl->setHasExternalLexicalStorage();
  - to_tag_decl->setMustBuildLookupTable();
  + to_tag_decl->getPrimaryContext()->setMustBuildLookupTable();
  if (log)
  log->Printf(
  