Request for review: 7022386 gethostbyname_r needs a pointer aligned buffer passed to it

[David Holmes]

webrev: http://cr.openjdk.java.net/~dholmes/7022386/webrev/

This is a very simple forward-port of a change that already went into 6u23.

Please cc me as I'm not on the net-dev list (which probably means this 
will get held up for approval :( )

Thanks,
David