... but don't update it in case it's a predefined API name

Change-Id: I20075a4e085bdeab8374860c16e7eb2a72772c33
Reviewed-on: https://gerrit.libreoffice.org/54879Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>