New test failures - observer.exp, sigaltstack.exp, siginfo.exp

[Joel Brobecker]

> observer.exp fails like this:
> 
> call observer_notify_normal_stop ()
> too few arguments in function call
> (gdb) PASS: gdb.gdb/observer.exp: sending notification (one observer)
> 
> Then all the counters are wrong, since the function call didn't happen. 
> That's definitely a problem in the test script, since observer_notify_normal_stop
> takes an argument; is this not a fatal condition on some other target?

I am working on this part. I will send a couple of patches soon.

-- 
Joel