Added header guards to files in directories l10ntools/, lotuswordpro/, and rsc/

Change-Id: I9c034d4bb5c92d78378bda4658d43a8b603d5281
Reviewed-on: https://gerrit.libreoffice.org/9581Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Tested-by: Thomas Arnhold <thomas@arnhold.org>