[Bug analyzer/115735] Analyzer misses trivial syslog() call in signal handler for -Wanalyzer-unsafe-call-within-signal-handler

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115735

--- Comment #10 from Sam James <sjames at gcc dot gnu.org> ---
Let me try whip up a proof of concept for the parsing then we can go from
there. Thank you for the help so far!

(Ah, good catch wrt sigaction -- I noticed something funny when testing but I
didn't clock it properly.)