Renaming used as it was confusing to assume the .mk file based on the
python test case, which was testssl.py.

Change-Id: I903b59aecf3b167f75494aefcfcde916febee69e
Reviewed-on: https://gerrit.libreoffice.org/69217
Tested-by: Jenkins
Reviewed-by: Samuel Mehrbrodt <Samuel.Mehrbrodt@cib.de>