[MacPorts] #41656: Update Go Portfile to 1.2

[MacPorts]

#41656: Update Go Portfile to 1.2
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  Reporter:  b@…     |      Owner:  ciserlohn@…
      Type:  update  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:  haspatch
      Port:  go      |
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Comment (by ciserlohn@…):

 Replying to [ticket:41656 b@…]:
 > Go 1.2 is officially released: http://blog.golang.org/go12

 Yes, I know. I'm on the golang mailing list(s).

 > Go 1.2 fixes several bugs with Clang compilation (confirmed on OS X
 10.9), so clang should not be blacklisted anymore.

 Thanks for the patch but just changing the checksums and removing the
 clang blacklisting is not enough. The godoc and vet commands have been
 moved to another repository (see
 http://golang.org/doc/go1.2#go_tools_godoc). Including them in the port
 requires some work.

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Ticket URL: <https://trac.macports.org/ticket/41656#comment:3>
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