A platform Python interpreter is a special variant of the interpreter,
that is only used for system software. It's located at
/usr/libexec/platform-python.

Fixes: https://pagure.io/freeipa/issue/7680


Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>