contrib: cgi: add more documentation for try_cleanup_status_on_install_failure()
contrib: cgi: add more documentation for try_cleanup_status_on_install_failure()

The decision whether a previous rauc update failed or not is not
self-explanatory.

Signed-off-by: Bastian Stender <591dbcb2d48f405f0cb405f5aa6519451f40ad30@pengutronix.de>

rauc/rauc,jluebbe/rauc,rauc/rauc,ejoerns/rauc,jluebbe/rauc,ejoerns/rauc,ejoerns/rauc,rauc/rauc,jluebbe/rauc