audit(4): Add tests for bind(2), bindat(2) and listen(2)

[aniketp]

Summary

This revision introduces the atf-c(3) tests which test the proper auditability of network
related syscalls in both success and failure mode. The corresponding audit class is network

The syscalls in question are:

• bind(2)
• bindat(2)
• listen(2)

Test Plan

Execute make && make install from test/sys/audit.
Execute kyua test from /usr/tests/sys/audit. All testcases should succeed.

[aniketp]

Correct the regex for socket_failure test-case

[asomers]

tests/sys/audit/network.c

48 ↗

(On Diff #43866)

s/failur/failure