ports/128447: Update science/silo to version 4.6.2

[amdmi3 at FreeBSD.org]

Synopsis: Update science/silo to version 4.6.2

Responsible-Changed-From-To: freebsd-ports-bugs->amdmi3
Responsible-Changed-By: amdmi3
Responsible-Changed-When: Wed Oct 29 15:09:09 UTC 2008
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=128447