Ignore SIGALRM in single-stepping

---

To ignore SIGALRM signals while single-stepping, but treat them normally during normal execution, you could define:

define hook-stop
handle SIGALRM nopass
end

define hook-run
handle SIGALRM pass
end

define hook-continue
handle SIGLARM pass
end

NB: recorded in ~gallinar/.gdbinit, which is read automatically by gdb if gallinar or which can be sourced (within gdb) if root.