[MacPorts] #36319: dbus @1.4.20_1 update to 1.6.4

[MacPorts]

#36319: dbus @1.4.20_1 update to 1.6.4
--------------------------+------------------------
 Reporter:  and.damore@…  |      Owner:  mcalhoun@…
     Type:  update        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.1.2
 Keywords:                |       Port:  dbus
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 [http://www.freedesktop.org/wiki/Software/dbus#Reference_Implementation_
 .28dbus-daemon_and_libdbus.29 dbus page] says that current stable branch
 is 1.6.x .

 Current patchflles applies as well to 1.6.4 so upgrading is
 straightforward.

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Ticket URL: <https://trac.macports.org/ticket/36319>
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