platform/netlink: use nm_random_get_bytes() for initial seq value
Summary
This MR changes the initial value for s_seq_expect
to be purely random instead of sourced from the current time.
Purpose
Coverity warns when a time_t is cast to 32-bits - however, we do not need to use the time here at all, since it is only used as an initializing value that is not expected to be a timestamp.
Checklist
Please read https://gitlab.freedesktop.org/NetworkManager/NetworkManager/-/blob/main/CONTRIBUTING.md before opening the merge request. In particular, check that:
-
the subject for all commits is concise and explicative -
the message for all commits explains the reason for the change -
the source is properly formatted -
any relevant documentation is up to date -
you have added unit tests if applicable -
the NEWS file is updated when the change deserves to be mentioned, for example for new features, behavior changes, API deprecations, etc.