ports/177665: [MAINTAINER] lang/rust: update to 0.6

[lwhsu at FreeBSD.org]

Synopsis: [MAINTAINER] lang/rust: update to 0.6

Responsible-Changed-From-To: freebsd-ports-bugs->lwhsu
Responsible-Changed-By: lwhsu
Responsible-Changed-When: Tue Apr 23 02:53:08 UTC 2013
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=177665