Update SIGNALS_THAT_SHOULD_THROW_EXCEPTION tuple

I have been using `sh` as a part of a larger integration test infrastructure for a `c++` project. Sometimes the commands I execute just terminate unexpectedly (i.e., the `SIGABRT` signal is issued). I am proposing to extend the list of signals that should throw an exception to include several common signals that are indicative of bad things happening under the hood :wink: 

The list was updated using as reference the table reported in [this Wikipedia article](http://en.wikipedia.org/wiki/Unix_signal).