[hobbit] Vmstat data for IRIX systems

Something like the attached patch should do it (I think it applies to 4.03rc2). It assumes your IRIX hosts have a BBOSTYPE that begins with "irix".

Yes, that's it. Indeed I never bothered trying to find whether vmstat could be used on IRIX..:-)

I'll probably wait for official releases...if you plan to include this (not sure as this may be considered somewhat specific to my setup).

In fact, I have decided to stay with official Hobbit releases on the server, now...and just use the Debian packages you provide (and, yes, I remember I said I would look at it...:-)).