[MacPorts] #44314: rust @0.10: update to 0.11

[MacPorts]

#44314: rust @0.10: update to 0.11
----------------------------+--------------------------------
 Reporter:  macports.org@…  |      Owner:  macports-tickets@…
     Type:  update          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.3.1
 Keywords:                  |       Port:  rust
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 0.11 was released on July 2

 https://mail.mozilla.org/pipermail/rust-dev/2014-July/010655.html

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Ticket URL: <https://trac.macports.org/ticket/44314>
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