Fix audit of chflagsat, lgetfh, and setfib

[asomers]

Summary

Fix audit of chflagsat, lgetfh, and setfib

These syscalls were always supposed to have been auditted, but due to
oversights never were.

[aniketp]

Woah! This was easy. Though I guess later on, we can add these lines to eliminate false positives from lgetfh(2)

pid = getpid();
snprintf(extregex, sizeof(extregex), "lgetfh.*%d.*return,success", pid);

Also, many more such tests can be improved similarly.